Remove runtime flags for sloppy mode block scoping features

test/mjsunit/es6/block-scope-class.js

 // Copyright 2015 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.
 
 // Test for conflicting variable bindings.
 
-// Flags: --harmony-sloppy --harmony-sloppy-function
-
 function AssertEqualsStrictAndSloppy(value, code) {
   assertEquals(value, eval("(function() {" + code + "})()"));
   assertEquals(value, eval("(function() { 'use strict'; " + code + "})()"));
   assertEquals(value, eval("(function() { var x = 0; {" + code + "} })()"));
   assertEquals(value, eval("(function() { 'use strict'; var x = 0; {"
                            + code + "} })()"));
 }
 
 function AssertThrowsStrictAndSloppy(code, error) {
   assertThrows("(function() {" + code + "})()", error);
@@ skipping 31 matching lines @@
   AssertThrowsStrictAndSloppy("class x { }; for (var x = 0; false;) { };",
                               SyntaxError);
   AssertThrowsStrictAndSloppy("for (var x = 0; false;) { }; class x { };",
                               SyntaxError);
 })();
 
 (function TestClassMutableBinding() {
   AssertEqualsStrictAndSloppy(
       "x3", "class x { }; var y = x.name; x = 3; return y + x;")
 })();