Revert of [heap] Reland uncommit unused large object page memory.

src/base/hashmap.h

Index: src/base/hashmap.h
diff --git a/src/base/hashmap.h b/src/base/hashmap.h
index 36755f62c3a051bf4bbe23d2a0515434594a0faf..efb5dc8baaafd7bdb0f036bca43347f1322aa42d 100644
--- a/src/base/hashmap.h
+++ b/src/base/hashmap.h
@@ -60,9 +60,6 @@
   // corresponding key, key hash, and NULL value.
   Entry* LookupOrInsert(void* key, uint32_t hash,
                         AllocationPolicy allocator = AllocationPolicy());
-
-  Entry* InsertNew(void* key, uint32_t hash,
-                   AllocationPolicy allocator = AllocationPolicy());
 
   // Removes the entry with matching key.
   // It returns the value of the deleted entry
@@ -136,17 +133,6 @@
   if (p->key != NULL) {
     return p;
   }
-
-  return InsertNew(key, hash, allocator);
-}
-
-template <class AllocationPolicy>
-typename TemplateHashMapImpl<AllocationPolicy>::Entry*
-TemplateHashMapImpl<AllocationPolicy>::InsertNew(void* key, uint32_t hash,
-                                                 AllocationPolicy allocator) {
-  // Find a matching entry.
-  Entry* p = Probe(key, hash);
-  DCHECK(p->key == NULL);
 
   // No entry found; insert one.
   p->key = key;