[intrinsics] Kill the %_IsMinusZero intrinsic.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index 0e9ac8ad45fff2e9e905300a49c5b75902de693d..cc369e29a0b36e4963479e9751a1da76ef4dd3c4 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -12232,15 +12232,6 @@ void HOptimizedGraphBuilder::GenerateIsJSReceiver(CallRuntime* call) {
 }
 
 
-void HOptimizedGraphBuilder::GenerateIsMinusZero(CallRuntime* call) {
-  DCHECK(call->arguments()->length() == 1);
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  HValue* value = Pop();
-  HCompareMinusZeroAndBranch* result = New<HCompareMinusZeroAndBranch>(value);
-  return ast_context()->ReturnControl(result, call->id());
-}
-
-
 void HOptimizedGraphBuilder::GenerateHasCachedArrayIndex(CallRuntime* call) {
   DCHECK(call->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));