[compiler] Drop the CompareNilIC.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 9898282d31d958ad1c08991e60e2c210c73a2d76..acec002c4083a84641ba1f3b5b3527251a8420bd 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -119,13 +119,6 @@ Callable CodeFactory::CompareIC(Isolate* isolate, Token::Value op) {
 
 
 // static
-Callable CodeFactory::CompareNilIC(Isolate* isolate, NilValue nil_value) {
-  Handle<Code> code = CompareNilICStub::GetUninitialized(isolate, nil_value);
-  return Callable(code, CompareNilDescriptor(isolate));
-}
-
-
-// static
 Callable CodeFactory::BinaryOpIC(Isolate* isolate, Token::Value op) {
   BinaryOpICStub stub(isolate, op);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());