[turbofan] Drop obsolete unused JSStrictNotEqual operator.

src/code-factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-factory.h"
 
 #include "src/bootstrapper.h"
 #include "src/ic/ic.h"
 #include "src/objects-inl.h"
 
@@ skipping 221 matching lines @@
 TFS_BUILTIN(ShiftLeft)
 TFS_BUILTIN(ShiftRight)
 TFS_BUILTIN(ShiftRightLogical)
 TFS_BUILTIN(LessThan)
 TFS_BUILTIN(LessThanOrEqual)
 TFS_BUILTIN(GreaterThan)
 TFS_BUILTIN(GreaterThanOrEqual)
 TFS_BUILTIN(Equal)
 TFS_BUILTIN(NotEqual)
 TFS_BUILTIN(StrictEqual)
-TFS_BUILTIN(StrictNotEqual)
 TFS_BUILTIN(CreateIterResultObject)
 TFS_BUILTIN(HasProperty)
 TFS_BUILTIN(NonNumberToNumber)
 TFS_BUILTIN(StringToNumber)
 TFS_BUILTIN(ToBoolean)
 TFS_BUILTIN(ToInteger)
 TFS_BUILTIN(ToLength)
 TFS_BUILTIN(ToName)
 TFS_BUILTIN(ToNumber)
 TFS_BUILTIN(ToObject)
@@ skipping 247 matching lines @@
 }
 
 // static
 Callable CodeFactory::FunctionPrototypeBind(Isolate* isolate) {
   return Callable(isolate->builtins()->FunctionPrototypeBind(),
                   BuiltinDescriptor(isolate));
 }
 
 }  // namespace internal
 }  // namespace v8