Revert "Add implementations of last in terms of next_back on a bunch of DoubleEndedIterators."

This reverts commit 3e86cf36b5114f201868bf459934fe346a76a2d4.

1 files changed, 0 insertions, 6 deletions

diff --git a/src/libstd/env.rs b/src/libstd/env.rs
index 260624a8bd8..9058ea93d6d 100644
--- a/src/libstd/env.rs
+++ b/src/libstd/env.rs
@@ -746,10 +746,6 @@ impl Iterator for Args {
         self.inner.next().map(|s| s.into_string().unwrap())
     }
     fn size_hint(&self) -> (usize, Option<usize>) { self.inner.size_hint() }
-    #[inline]
-    fn last(mut self) -> Option<String> {
-        self.next_back()
-    }
 }
 
 #[stable(feature = "env", since = "1.0.0")]
@@ -785,8 +781,6 @@ impl Iterator for ArgsOs {
     type Item = OsString;
     fn next(&mut self) -> Option<OsString> { self.inner.next() }
     fn size_hint(&self) -> (usize, Option<usize>) { self.inner.size_hint() }
-    #[inline]
-    fn last(mut self) -> Option<OsString> { self.next_back() }
 }
 
 #[stable(feature = "env", since = "1.0.0")]