diff --git a/docs/component-modules.md b/docs/component-modules.md
index 264788217..7277febc0 100644
--- a/docs/component-modules.md
+++ b/docs/component-modules.md
@@ -43,12 +43,6 @@ Jackson2 extensions to the Google API Client Library for Java
 (`google-api-client-jackson2`). This module depends on `google-api-client` and
 `google-http-client-jackson2`.
 
-## google-api-client-java6
-
-Java 6 (and higher) extensions to the Google API Client Library for Java
-(`google-api-client-java6`). This module depends on `google-api-client` and
-`google-oauth-client-java6`.
-
 ## google-api-client-protobuf
 
 [Protocol buffer][protobuf] extensions to the Google API Client Library for Java
diff --git a/google-api-client-assembly/classpath-include b/google-api-client-assembly/classpath-include
index c6e53b922..7753e19a6 100644
--- a/google-api-client-assembly/classpath-include
+++ b/google-api-client-assembly/classpath-include
@@ -3,7 +3,6 @@
 	<classpathentry kind="lib" path="libs/google-api-client-appengine-${project.version}.jar" sourcepath="libs-sources/google-api-client-appengine-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-gson-${project.version}.jar" sourcepath="libs-sources/google-api-client-gson-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-jackson2-${project.version}.jar" sourcepath="libs-sources/google-api-client-jackson2-${project.version}-sources.jar"/>
-	<classpathentry kind="lib" path="libs/google-api-client-java6-${project.version}.jar" sourcepath="libs-sources/google-api-client-java6-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-protobuf-${project.version}.jar" sourcepath="libs-sources/google-api-client-protobuf-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-servlet-${project.version}.jar" sourcepath="libs-sources/google-api-client-servlet-${project.version}-sources.jar"/>
 	<classpathentry kind="lib" path="libs/google-api-client-xml-${project.version}.jar" sourcepath="libs-sources/google-api-client-xml-${project.version}-sources.jar"/>
diff --git a/google-api-client-assembly/pom.xml b/google-api-client-assembly/pom.xml
index 34eebca7c..b9db66a92 100644
--- a/google-api-client-assembly/pom.xml
+++ b/google-api-client-assembly/pom.xml
@@ -37,10 +37,6 @@
       <groupId>com.google.api-client</groupId>
       <artifactId>google-api-client-jackson2</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.api-client</groupId>
-      <artifactId>google-api-client-java6</artifactId>
-    </dependency>
     <dependency>
       <groupId>com.google.api-client</groupId>
       <artifactId>google-api-client-protobuf</artifactId>
diff --git a/google-api-client-bom/pom.xml b/google-api-client-bom/pom.xml
index e0da65af9..d225f0864 100644
--- a/google-api-client-bom/pom.xml
+++ b/google-api-client-bom/pom.xml
@@ -91,11 +91,6 @@
         <artifactId>google-api-client-jackson2</artifactId>
         <version>2.1.5-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
       </dependency>
-      <dependency>
-        <groupId>com.google.api-client</groupId>
-        <artifactId>google-api-client-java6</artifactId>
-        <version>2.1.5-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
-      </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-protobuf</artifactId>
diff --git a/google-api-client-java6/pom.xml b/google-api-client-java6/pom.xml
deleted file mode 100644
index 72aa64920..000000000
--- a/google-api-client-java6/pom.xml
+++ /dev/null
@@ -1,96 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>com.google.api-client</groupId>
-    <artifactId>google-api-client-parent</artifactId>
-    <version>2.1.5-SNAPSHOT</version><!-- {x-version-update:google-api-client:current} -->
-    <relativePath>../pom.xml</relativePath>
-  </parent>
-  <artifactId>google-api-client-java6</artifactId>
-  <name>Java 6 (and higher) Extensions to the Google API Client Library for Java.</name>
-  <build>
-    <plugins>
-      <plugin>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <configuration>
-          <links>
-            <link>http://download.oracle.com/javase/7/docs/api/</link>
-            <link>https://googleapis.dev/java/google-http-client/${project.http.version}/</link>
-          </links>
-          <doctitle>${project.name} ${project.version}</doctitle>
-          <windowtitle>${project.artifactId} ${project.version}</windowtitle>
-        </configuration>
-      </plugin>
-      <plugin>
-        <artifactId>maven-jar-plugin</artifactId>
-        <configuration>
-          <archive>
-            <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
-            <manifest>
-              <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
-            </manifest>
-            <manifestEntries>
-              <Automatic-Module-Name>google.api.client.java6</Automatic-Module-Name>
-            </manifestEntries>
-          </archive>
-        </configuration>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.felix</groupId>
-        <artifactId>maven-bundle-plugin</artifactId>
-        <version>5.1.8</version>
-        <executions>
-          <execution>
-            <id>bundle-manifest</id>
-            <phase>process-classes</phase>
-            <goals>
-              <goal>manifest</goal>
-            </goals>
-          </execution>
-        </executions>
-        <configuration>
-          <instructions>
-            <Bundle-DocURL>https://googleapis.dev/java/google-api-client/${project.version}/index.html</Bundle-DocURL>
-            <Bundle-Description>Java 6 extensions to the Google APIs Client Library for Java</Bundle-Description>
-            <Bundle-SymbolicName>com.google.api.client.java6</Bundle-SymbolicName>
-          </instructions>
-        </configuration>
-      </plugin>
-      <plugin>
-        <artifactId>maven-source-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>source-jar</id>
-            <phase>compile</phase>
-            <goals>
-              <goal>jar</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-      <!--Set minimum requirement to Java 7-->
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>animal-sniffer-maven-plugin</artifactId>
-        <configuration>
-          <signature>
-            <groupId>org.codehaus.mojo.signature</groupId>
-            <artifactId>java17</artifactId>
-            <version>1.0</version>
-          </signature>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
-  <dependencies>
-    <dependency>
-      <groupId>com.google.api-client</groupId>
-      <artifactId>google-api-client</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.google.oauth-client</groupId>
-      <artifactId>google-oauth-client-java6</artifactId>
-    </dependency>
-  </dependencies>
-</project>
diff --git a/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java b/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java
deleted file mode 100644
index 0fcc8e336..000000000
--- a/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/GooglePromptReceiver.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright 2012 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
- * or implied. See the License for the specific language governing permissions and limitations under
- * the License.
- */
-
-package com.google.api.client.googleapis.extensions.java6.auth.oauth2;
-
-import com.google.api.client.extensions.java6.auth.oauth2.AbstractPromptReceiver;
-import com.google.api.client.googleapis.auth.oauth2.GoogleOAuthConstants;
-import java.io.IOException;
-
-/**
- * Google OAuth 2.0 abstract verification code receiver that prompts user to paste the code copied
- * from the browser.
- *
- * <p>This uses deprecated OAuth out-of-band (oob) flow. To migrate to an alternative flow, please
- * refer to <a href="https://developers.googleblog.com/2022/02/making-oauth-flows-safer.html">Making
- * Google OAuth interactions safer by using more secure OAuth flows</a>.
- *
- * <p>Implementation is thread-safe.
- *
- * @since 1.11
- * @author Yaniv Inbar
- */
-@Deprecated
-public class GooglePromptReceiver extends AbstractPromptReceiver {
-
-  @Override
-  public String getRedirectUri() throws IOException {
-    return GoogleOAuthConstants.OOB_REDIRECT_URI;
-  }
-}
diff --git a/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/package-info.java b/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/package-info.java
deleted file mode 100644
index a07b65a90..000000000
--- a/google-api-client-java6/src/main/java/com/google/api/client/googleapis/extensions/java6/auth/oauth2/package-info.java
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright 2012 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software distributed under the License
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
- * or implied. See the License for the specific language governing permissions and limitations under
- * the License.
- */
-
-/**
- * Google OAuth 2.0 utilities that help simplify the authorization flow on Java 6.
- *
- * @since 1.11
- * @author Yaniv Inbar
- */
-package com.google.api.client.googleapis.extensions.java6.auth.oauth2;
diff --git a/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/GoogleOAuthConstants.java b/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/GoogleOAuthConstants.java
index 2e4ea5733..809c96dda 100644
--- a/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/GoogleOAuthConstants.java
+++ b/google-api-client/src/main/java/com/google/api/client/googleapis/auth/oauth2/GoogleOAuthConstants.java
@@ -40,17 +40,5 @@ public class GoogleOAuthConstants {
   public static final String DEFAULT_PUBLIC_CERTS_ENCODED_URL =
       "https://www.googleapis.com/oauth2/v1/certs";
 
-  /**
-   * Redirect URI to use for an installed application as specified in <a
-   * href="https://developers.google.com/identity/protocols/OAuth2InstalledApp">Using OAuth 2.0 for
-   * Mobile & Desktop Apps</a>.
-   *
-   * <p>OAuth out-of-band (oob) flow has been deprecated. To migrate to an alternative flow, please
-   * refer to <a
-   * href="https://developers.googleblog.com/2022/02/making-oauth-flows-safer.html">Making Google
-   * OAuth interactions safer by using more secure OAuth flows</a>.
-   */
-  @Deprecated public static final String OOB_REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob";
-
   private GoogleOAuthConstants() {}
 }
diff --git a/pom.xml b/pom.xml
index 2df3abfa3..cd0292910 100644
--- a/pom.xml
+++ b/pom.xml
@@ -78,7 +78,6 @@
     <module>google-api-client-bom</module>
     <module>google-api-client-gson</module>
     <module>google-api-client-jackson2</module>
-    <module>google-api-client-java6</module>
     <module>google-api-client-protobuf</module>
     <module>google-api-client-xml</module>
   </modules>
@@ -178,11 +177,6 @@
         <artifactId>google-api-client-android</artifactId>
         <version>${project.version}</version>
       </dependency>
-      <dependency>
-        <groupId>com.google.api-client</groupId>
-        <artifactId>google-api-client-java6</artifactId>
-        <version>${project.version}</version>
-      </dependency>
       <dependency>
         <groupId>com.google.api-client</groupId>
         <artifactId>google-api-client-gson</artifactId>
@@ -410,10 +404,6 @@
                   <title>google-api-client-jackson2</title>
                   <packages>com.google.api.client.googleapis.notifications.json.jackson2.*</packages>
                 </group>
-                <group>
-                  <title>google-api-client-java6</title>
-                  <packages>com.google.api.client.googleapis.extensions.java6.*</packages>
-                </group>
                 <group>
                   <title>google-api-client-protobuf</title>
                   <packages>com.google.api.client.googleapis.services.protobuf*:com.google.api.client.googleapis.testing.services.protobuf*</packages>