2 files changed, 3 insertions, 5 deletions
diff --git a/library/proc_macro/src/bridge/fxhash.rs b/library/proc_macro/src/bridge/fxhash.rs
index 17bd0a1b3..f4e905441 100644
--- a/library/proc_macro/src/bridge/fxhash.rs
+++ b/library/proc_macro/src/bridge/fxhash.rs
@@ -5,8 +5,6 @@
 //! on the `rustc_hash` crate.
 
 use std::collections::HashMap;
-use std::convert::TryInto;
-use std::default::Default;
 use std::hash::BuildHasherDefault;
 use std::hash::Hasher;
 use std::mem::size_of;
diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
index 938935771..9d081c8b8 100644
--- a/library/proc_macro/src/lib.rs
+++ b/library/proc_macro/src/lib.rs
@@ -47,7 +47,7 @@ use std::cmp::Ordering;
 use std::ops::RangeBounds;
 use std::path::PathBuf;
 use std::str::FromStr;
-use std::{error, fmt, iter};
+use std::{error, fmt};
 
 /// Determines whether proc_macro has been made accessible to the currently
 /// running program.
@@ -310,7 +310,7 @@ impl ConcatStreamsHelper {
 
 /// Collects a number of token trees into a single stream.
 #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
-impl iter::FromIterator<TokenTree> for TokenStream {
+impl FromIterator<TokenTree> for TokenStream {
     fn from_iter<I: IntoIterator<Item = TokenTree>>(trees: I) -> Self {
         let iter = trees.into_iter();
         let mut builder = ConcatTreesHelper::new(iter.size_hint().0);
@@ -322,7 +322,7 @@ impl iter::FromIterator<TokenTree> for TokenStream {
 /// A "flattening" operation on token streams, collects token trees
 /// from multiple token streams into a single stream.
 #[stable(feature = "proc_macro_lib", since = "1.15.0")]
-impl iter::FromIterator<TokenStream> for TokenStream {
+impl FromIterator<TokenStream> for TokenStream {
     fn from_iter<I: IntoIterator<Item = TokenStream>>(streams: I) -> Self {
         let iter = streams.into_iter();
         let mut builder = ConcatStreamsHelper::new(iter.size_hint().0);