Remove --harmony-scoping flag.

test/mjsunit/es6/debug-function-scopes.js

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-// Flags: --expose-debug-as debug --harmony-scoping
+// Flags: --expose-debug-as debug
 
 "use strict";
 let top_level_let = 255;
 
 // Get the Debug object exposed from the debug context global object.
 var Debug = debug.Debug;
 
 function CheckScope(scope_mirror, scope_expectations, expected_scope_type) {
   assertEquals(expected_scope_type, scope_mirror.scopeType());
 
@@ skipping 71 matching lines @@
 assertEquals(6, mirror.scopeCount());
 
 // Implementation artifact: l4 isn't used in closure, but still it is saved.
 CheckScope(mirror.scope(0), { l4: 11 }, ScopeType.Block);
 
 CheckScope(mirror.scope(1), { l3: 9 }, ScopeType.Block);
 CheckScope(mirror.scope(2), { l1: 6, l2: 7 }, ScopeType.Block);
 CheckScope(mirror.scope(3), { v1:3, l0: 0, v3: 5, v6: 11 }, ScopeType.Closure);
 CheckScope(mirror.scope(4), { top_level_let: 255 }, ScopeType.Script);
 CheckScope(mirror.scope(5), {}, ScopeType.Global);