[turbofan] Remove the JSContextRelaxation reducer.

src/compiler/common-operator.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/compiler/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 843 matching lines @@
   } else {
     UNREACHABLE();
     return nullptr;
   }
 }
 
 
 const FrameStateFunctionInfo*
 CommonOperatorBuilder::CreateFrameStateFunctionInfo(
     FrameStateType type, int parameter_count, int local_count,
-    Handle<SharedFunctionInfo> shared_info,
-    ContextCallingMode context_calling_mode) {
+    Handle<SharedFunctionInfo> shared_info) {
   return new (zone()->New(sizeof(FrameStateFunctionInfo)))
-      FrameStateFunctionInfo(type, parameter_count, local_count, shared_info,
-                             context_calling_mode);
+      FrameStateFunctionInfo(type, parameter_count, local_count, shared_info);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8