Remove stl_util's STLDeleteContainerPairPointers.

base/stl_util.h

Index: base/stl_util.h
diff --git a/base/stl_util.h b/base/stl_util.h
index b7e9cfc965bf9d572c8b420157a77729471da2c5..bb775f3e8563c98fd326417029df7934caccca99 100644
--- a/base/stl_util.h
+++ b/base/stl_util.h
@@ -48,24 +48,6 @@ void STLDeleteContainerPointers(ForwardIterator begin, ForwardIterator end) {
 }
 
 // For a range within a container of pairs, calls delete (non-array version) on
-// BOTH items in the pairs.
-// NOTE: Like STLDeleteContainerPointers, it is important that this deletes
-// behind the iterator because if both the key and value are deleted, the
-// container may call the hash function on the iterator when it is advanced,
-// which could result in the hash function trying to dereference a stale
-// pointer.
-template <class ForwardIterator>
-void STLDeleteContainerPairPointers(ForwardIterator begin,
-                                    ForwardIterator end) {
-  while (begin != end) {
-    ForwardIterator temp = begin;
-    ++begin;
-    delete temp->first;
-    delete temp->second;
-  }
-}
-
-// For a range within a container of pairs, calls delete (non-array version) on
 // the FIRST item in the pairs.
 // NOTE: Like STLDeleteContainerPointers, deleting behind the iterator.
 template <class ForwardIterator>