Make KeyedStores from a sloppy arguments array use a handler.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 4e3d640adc27e29ce6e3f06016422d68ffef7cd8..4296dc4745e146eefcdd60483fedb48436ff0fc3 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1369,11 +1369,6 @@ static void Generate_KeyedStoreIC_PreMonomorphic_Strict(MacroAssembler* masm) {
 }
 
 
-static void Generate_KeyedStoreIC_SloppyArguments(MacroAssembler* masm) {
-  KeyedStoreIC::GenerateSloppyArguments(masm);
-}
-
-
 static void Generate_CallICStub_DebugBreak(MacroAssembler* masm) {
   DebugCodegen::GenerateCallICStubDebugBreak(masm);
 }