VM: Remove unused (and incomplete) HashMap::Remove() function

runtime/platform/hashmap.h

Index: runtime/platform/hashmap.h
diff --git a/runtime/platform/hashmap.h b/runtime/platform/hashmap.h
index 240e94d1a0f523a4c7eb17f2537507295bf588c5..be8278e909d61aa90928a9733f027c2f2907dd1e 100644
--- a/runtime/platform/hashmap.h
+++ b/runtime/platform/hashmap.h
@@ -66,23 +66,6 @@ class HashMap {
   // otherwise the iteration might step over elements!
   void Remove(void* key, uint32_t hash);
 
-  // Removes the entry and returns the next entry (in iteration order) after
-  // this one.
-  //
-  // Usage instructions for removing elements during iteration:
-  //
-  //    HashMap::Entry* current = map.Start();
-  //    while (current != NULL) {
-  //       ...
-  //      if (condition) {
-  //        current = map.Remove(current);
-  //      } else {
-  //        current = map.Next(current);
-  //      }
-  //    }
-  //
-  Entry* Remove(Entry* entry);
-
   // Empties the hash map (occupancy() == 0), and calls the function 'clear' on
   // each of the values if given.
   void Clear(ClearFun clear = NULL);