Remove --harmony-scoping flag.

test/cctest/test-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7628 matching lines @@
 
   ExpectInt32("allScopes[0].scopeObject().value_.y", 2);
 
   CompileRun("allScopes[0].setVariableValue('x', 5);");
   CompileRun("allScopes[0].setVariableValue('y', 6);");
   ExpectInt32("frame.evaluate('x + y').value_", 11);
 }
 
 
 TEST(DebugBreakInLexicalScopes) {
-  i::FLAG_harmony_scoping = true;
   i::FLAG_allow_natives_syntax = true;
 
   DebugLocalContext env;
   v8::Isolate* isolate = env->GetIsolate();
   v8::HandleScope scope(isolate);
   v8::Debug::SetDebugEventListener(DebugHarmonyScopingListener);
 
   CompileRun(
       "'use strict';            \n"
       "let x = 1;               \n");
   ExpectInt32(
       "'use strict';            \n"
       "let y = 2;               \n"
       "debugger;                \n"
       "x * y",
       30);
   ExpectInt32(
       "x = 1; y = 2; \n"
       "debugger;"
       "x * y",
       30);
 }