diff --git a/crates/mdman/src/hbs.rs b/crates/mdman/src/hbs.rs
index 022e696b8e3..81ad7ee458d 100644
--- a/crates/mdman/src/hbs.rs
+++ b/crates/mdman/src/hbs.rs
@@ -7,7 +7,6 @@ use handlebars::{
     RenderContext, RenderError, Renderable,
 };
 use std::collections::HashMap;
-use std::convert::TryFrom;
 use std::path::Path;
 
 type FormatterRef<'a> = &'a (dyn Formatter + Send + Sync);
diff --git a/src/cargo/core/compiler/fingerprint.rs b/src/cargo/core/compiler/fingerprint.rs
index be8d060c73e..661bf0cd2a6 100644
--- a/src/cargo/core/compiler/fingerprint.rs
+++ b/src/cargo/core/compiler/fingerprint.rs
@@ -313,7 +313,6 @@
 //! <https://github.com/rust-lang/cargo/issues?q=is%3Aissue+is%3Aopen+label%3AA-rebuild-detection>
 
 use std::collections::hash_map::{Entry, HashMap};
-use std::convert::TryInto;
 use std::env;
 use std::hash::{self, Hash, Hasher};
 use std::io;
diff --git a/src/cargo/sources/registry/index.rs b/src/cargo/sources/registry/index.rs
index e7c8d220947..15c19990c44 100644
--- a/src/cargo/sources/registry/index.rs
+++ b/src/cargo/sources/registry/index.rs
@@ -76,7 +76,6 @@ use cargo_util::{paths, registry::make_dep_path};
 use log::{debug, info};
 use semver::Version;
 use std::collections::{HashMap, HashSet};
-use std::convert::TryInto;
 use std::fs;
 use std::io::ErrorKind;
 use std::path::Path;
diff --git a/tests/testsuite/dep_info.rs b/tests/testsuite/dep_info.rs
index ae385b13781..5893354aa0c 100644
--- a/tests/testsuite/dep_info.rs
+++ b/tests/testsuite/dep_info.rs
@@ -8,7 +8,6 @@ use cargo_test_support::{
     basic_bin_manifest, basic_manifest, is_nightly, main_file, project, rustc_host, Project,
 };
 use filetime::FileTime;
-use std::convert::TryInto;
 use std::fs;
 use std::path::Path;
 use std::str;