diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index e027db8b56c0..f41114839020 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -32,7 +32,6 @@ use std::collections::hash_map::Entry;
 use std::default::Default;
 use std::hash::Hash;
 use std::rc::Rc;
-use std::u32;
 use std::{mem, vec};
 
 use crate::core::{self, DocContext, ImplTraitParam};
diff --git a/src/librustdoc/passes/unindent_comments.rs b/src/librustdoc/passes/unindent_comments.rs
index d4e09ce47a3c..5604a9c2dc16 100644
--- a/src/librustdoc/passes/unindent_comments.rs
+++ b/src/librustdoc/passes/unindent_comments.rs
@@ -1,6 +1,5 @@
 use std::cmp;
 use std::string::String;
-use std::usize;
 
 use crate::clean::{self, DocFragment, Item};
 use crate::core::DocContext;