[crankshaft] Remove adventurous operator< for Handle<Map>.

src/handles.h

Index: src/handles.h
diff --git a/src/handles.h b/src/handles.h
index eb2023cf335d8cc93571d857e6268108b0e081a2..162b6d282f2cdae48f3f3141a17f5f6e5a124e57 100644
--- a/src/handles.h
+++ b/src/handles.h
@@ -174,13 +174,6 @@ inline Handle<T> handle(T* t) {
 }
 
 
-// Key comparison function for Map handles.
-inline bool operator<(const Handle<Map>& lhs, const Handle<Map>& rhs) {
-  // This is safe because maps don't move.
-  return *lhs < *rhs;
-}
-
-
 class DeferredHandles;
 class HandleScopeImplementer;