Remove the compiled_transitions flag and cleanup the unused code.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index eaba839aa46abe9216b19e99e46ae039763d4339..4a5cd03b6f9fa977e44a967dd6729bbab32c1d05 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1551,15 +1551,6 @@ static void Generate_KeyedStoreIC_NonStrictArguments(MacroAssembler* masm) {
 }
 
 
-static void Generate_TransitionElementsSmiToDouble(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateTransitionElementsSmiToDouble(masm);
-}
-
-
-static void Generate_TransitionElementsDoubleToObject(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateTransitionElementsDoubleToObject(masm);
-}
-
 #ifdef ENABLE_DEBUGGER_SUPPORT
 static void Generate_LoadIC_DebugBreak(MacroAssembler* masm) {
   Debug::GenerateLoadICDebugBreak(masm);