Revert of [stubs] Introduce LeftShift, SignedRightShift and UnsignedRightShift stubs.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index a19d876dd96a0059eb9574adcd8f90a071f4be02..196d6a81908d62b8dec38e15d0f30eccf015cbf2 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -236,24 +236,6 @@
 // static
 Callable CodeFactory::Modulus(Isolate* isolate) {
   ModulusStub stub(isolate);
-  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
-}
-
-// static
-Callable CodeFactory::ShiftRight(Isolate* isolate) {
-  ShiftRightStub stub(isolate);
-  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
-}
-
-// static
-Callable CodeFactory::ShiftRightLogical(Isolate* isolate) {
-  ShiftRightLogicalStub stub(isolate);
-  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
-}
-
-// static
-Callable CodeFactory::ShiftLeft(Isolate* isolate) {
-  ShiftLeftStub stub(isolate);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }