Move weakref to gem at 0.1.1

We use the same Ruby code for this now, so we can use the gem.

.gitignore

@@ -124,6 +124,7 @@ lib/ruby/stdlib/tsort*
 lib/ruby/stdlib/un*
 lib/ruby/stdlib/uri*
 lib/ruby/stdlib/yaml*
+lib/ruby/stdlib/weakref*
 
 release.properties
 share

lib/pom.rb

@@ -120,8 +120,7 @@ def log(message=nil)
     ['tsort', '0.1.0'],
     ['un', '0.2.0'],
     ['uri', '0.11.0'],
-    # https://github.com/ruby/weakref/issues/6
-    # ['weakref', '0.1.1'],
+    ['weakref', '0.1.1'],
     # https://github.com/ruby/win32ole/issues/12
     # ['win32ole', '1.8.8'],
     ['yaml', '0.2.0'],

lib/pom.xml

@@ -681,6 +681,19 @@ DO NOT MODIFIY - GENERATED CODE
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>rubygems</groupId>
+      <artifactId>weakref</artifactId>
+      <version>0.1.1</version>
+      <type>gem</type>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <artifactId>jar-dependencies</artifactId>
+          <groupId>rubygems</groupId>
+        </exclusion>
+      </exclusions>
+    </dependency>
     <dependency>
       <groupId>rubygems</groupId>
       <artifactId>yaml</artifactId>
@@ -869,6 +882,7 @@ DO NOT MODIFIY - GENERATED CODE
           <include>specifications/tsort-0.1.0*</include>
           <include>specifications/un-0.2.0*</include>
           <include>specifications/uri-0.11.0*</include>
+          <include>specifications/weakref-0.1.1*</include>
           <include>specifications/yaml-0.2.0*</include>
           <include>specifications/matrix-0.4.2*</include>
           <include>specifications/minitest-5.15.0*</include>
@@ -928,6 +942,7 @@ DO NOT MODIFIY - GENERATED CODE
           <include>gems/tsort-0.1.0*/**/*</include>
           <include>gems/un-0.2.0*/**/*</include>
           <include>gems/uri-0.11.0*/**/*</include>
+          <include>gems/weakref-0.1.1*/**/*</include>
           <include>gems/yaml-0.2.0*/**/*</include>
           <include>gems/matrix-0.4.2*/**/*</include>
           <include>gems/minitest-5.15.0*/**/*</include>
@@ -987,6 +1002,7 @@ DO NOT MODIFIY - GENERATED CODE
           <include>cache/tsort-0.1.0*</include>
           <include>cache/un-0.2.0*</include>
           <include>cache/uri-0.11.0*</include>
+          <include>cache/weakref-0.1.1*</include>
           <include>cache/yaml-0.2.0*</include>
           <include>cache/matrix-0.4.2*</include>
           <include>cache/minitest-5.15.0*</include>

tool/sync_ruby_files.rb

@@ -1,6 +1,5 @@
 STDLIB_FILES = %w[
   unicode_normalize
-  weakref.rb
 ]
 
 EXT_FILES = {