Remove dummy type parameters from iterator adaptors

With the recent fixes to method resolution, we can now remove the
dummy type parameters used as crutches in the iterator module.

For example, the zip adaptor type is just ZipIterator<T, U> now.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/hashmap.rs b/src/libstd/hashmap.rs
index deeda501942..818c6b69b81 100644
--- a/src/libstd/hashmap.rs
+++ b/src/libstd/hashmap.rs
@@ -770,7 +770,7 @@ impl<T:Hash + Eq> HashSet<T> {
 
     /// Visit the values representing the symmetric difference
     pub fn symmetric_difference_iter<'a>(&'a self, other: &'a HashSet<T>)
-        -> ChainIterator<&'a T, SetAlgebraIter<'a, T>, SetAlgebraIter<'a, T>> {
+        -> ChainIterator<SetAlgebraIter<'a, T>, SetAlgebraIter<'a, T>> {
         self.difference_iter(other).chain_(other.difference_iter(self))
     }
 
@@ -783,7 +783,7 @@ impl<T:Hash + Eq> HashSet<T> {
 
     /// Visit the values representing the union
     pub fn union_iter<'a>(&'a self, other: &'a HashSet<T>)
-        -> ChainIterator<&'a T, HashSetIterator<'a, T>, SetAlgebraIter<'a, T>> {
+        -> ChainIterator<HashSetIterator<'a, T>, SetAlgebraIter<'a, T>> {
         self.iter().chain_(other.difference_iter(self))
     }