Revert of Collect type feedback on result of Math.[round|ceil|floor]

src/type-info.cc

Index: src/type-info.cc
diff --git a/src/type-info.cc b/src/type-info.cc
index f50949508c156b3f2f642ffe12cf4a16dde113e9..4ad66f85573e78786bb0716be81550146bdd627a 100644
--- a/src/type-info.cc
+++ b/src/type-info.cc
@@ -139,22 +139,6 @@
 bool TypeFeedbackOracle::CallIsMonomorphic(FeedbackVectorICSlot slot) {
   Handle<Object> value = GetInfo(slot);
   return value->IsAllocationSite() || value->IsJSFunction();
-}
-
-
-bool TypeFeedbackOracle::CallIsBuiltinWithMinusZeroResult(
-    FeedbackVectorICSlot slot) {
-  Handle<Object> value = GetInfo(slot);
-  if (!value->IsJSFunction()) return false;
-  Handle<JSFunction> maybe_round(Handle<JSFunction>::cast(value));
-  if (!maybe_round->shared()->HasBuiltinFunctionId()) return false;
-  if (maybe_round->shared()->builtin_function_id() != kMathRound &&
-      maybe_round->shared()->builtin_function_id() != kMathFloor &&
-      maybe_round->shared()->builtin_function_id() != kMathCeil) {
-    return false;
-  }
-  return feedback_vector_->get(feedback_vector_->GetIndex(slot) + 1) ==
-         Smi::FromInt(CallICStub::kHasReturnedMinusZeroSentinel);
 }