X87: [stubs] Port builtin for Array.push fast-case from Crankshaft to TF.

  port df2578d2 (r41368)

  original commit message:
  Improves performance in simple, single element case by 5% and in multiple
  elements cases by 2%.

BUG=

Review-Url: https://codereview.chromium.org/2540803004
Cr-Commit-Position: refs/heads/master@{#41377}

src/x87/code-stubs-x87.cc

@@ -34,11 +34,6 @@ void ArrayNArgumentsConstructorStub::Generate(MacroAssembler* masm) {
   __ TailCallRuntime(Runtime::kNewArray);
 }
 
-void FastArrayPushStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
-  Address deopt_handler = Runtime::FunctionForId(Runtime::kArrayPush)->entry;
-  descriptor->Initialize(eax, deopt_handler, -1, JS_FUNCTION_STUB_MODE);
-}
-
 void FastFunctionBindStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   Address deopt_handler = Runtime::FunctionForId(Runtime::kFunctionBind)->entry;