[intrinsics] Kill the %_IsMinusZero intrinsic.

src/compiler/js-intrinsic-lowering.h

Index: src/compiler/js-intrinsic-lowering.h
diff --git a/src/compiler/js-intrinsic-lowering.h b/src/compiler/js-intrinsic-lowering.h
index be8d04c3ff0cfbe3da2f2e166d26569723553091..e0ade1bc0de971775099b83b991b64a760b39ea4 100644
--- a/src/compiler/js-intrinsic-lowering.h
+++ b/src/compiler/js-intrinsic-lowering.h
@@ -44,7 +44,6 @@ class JSIntrinsicLowering final : public AdvancedReducer {
   Reduction ReduceDoubleHi(Node* node);
   Reduction ReduceDoubleLo(Node* node);
   Reduction ReduceIncrementStatsCounter(Node* node);
-  Reduction ReduceIsMinusZero(Node* node);
   Reduction ReduceIsInstanceType(Node* node, InstanceType instance_type);
   Reduction ReduceIsJSReceiver(Node* node);
   Reduction ReduceIsSmi(Node* node);