Remove stl_util's deletion functions.

base/stl_util.h

Index: base/stl_util.h
diff --git a/base/stl_util.h b/base/stl_util.h
index fef3eaa6430a32b2018922e49f5946cc2313b718..016bb156450692415d9814f6a011446cf68ca591 100644
--- a/base/stl_util.h
+++ b/base/stl_util.h
@@ -54,26 +54,6 @@ inline char* string_as_array(std::string* str) {
   return str->empty() ? NULL : &*str->begin();
 }
 
-// The following function is useful for cleaning up STL containers whose
-// elements point to allocated memory.
-
-// Given an STL container consisting of (key, value) pairs, STLDeleteValues
-// deletes all the "value" components and clears the container.  Does nothing
-// in the case it's given a NULL pointer.
-template <class T>
-void STLDeleteValues(T* container) {
-  if (!container)
-    return;
-
-  for (auto it = container->begin(); it != container->end();) {
-    auto temp = it;
-    ++it;
-    delete temp->second;
-  }
-
-  container->clear();
-}
-
 // Test to see if a set, map, hash_set or hash_map contains a particular key.
 // Returns true if the key is in the collection.
 template <typename Collection, typename Key>