IDL: Remove last traces of [TypeChecking=Unrestricted]

Source/bindings/tests/idls/modules/TestInterface5.idl

 /*
  * Copyright (C) 2013 Google Inc. 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
@@ skipping 23 matching lines @@
 enum TestEnumModules { "EnumModulesValue1", "EnumModulesValue2" };
 
 [
     ActiveDOMObject,
     Conditional=CONDITION,
     Custom=(LegacyCallAsFunction,ToV8),
     DoNotCheckConstants,
     ImplementedAs=TestInterface5Implementation,
     RuntimeEnabled=FeatureName,
     SetWrapperReferenceTo(TestInterface5 referencedName),
-    TypeChecking=(Interface,Unrestricted),
+    TypeChecking=Interface,
     Exposed=(Worker,Window),
 ] interface TestInterface5 : TestInterfaceEmpty {
     // members needed to test [ImplementedAs], as this affect attribute
     // configuration and method configuration, and [TypeChecking]
     // constants also needed for [DoNotCheckConstants]
     const unsigned long UNSIGNED_LONG = 0;
     [Reflect=CONST_CPP] const short CONST_JAVASCRIPT = 1;
 
     attribute TestInterface5 testInterfaceAttribute; // Self-referential interface type with [ImplementedAs]
     attribute TestInterface5Constructor testInterfaceConstructorAttribute;
@@ skipping 35 matching lines @@
 
     [Exposed=(Window,ServiceWorker)] void windowAndServiceWorkerExposedMethod();
 
     // Union types
     void voidMethodBooleanOrDOMStringArg((boolean or DOMString) arg);
     void voidMethodDoubleOrDOMStringArg((double or DOMString) arg);
 
     iterable<any>;
 };