Remove unnecessary [NoInterfaceObject] from testing IDL files

Source/core/testing/InternalSettings.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
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 [
     WillBeGarbageCollected,
-    NoInterfaceObject,  // testing interfaces do not appear on global objects
 ] interface InternalSettings : InternalSettingsGenerated {
     // All methods which access Page::settings() can raise an exception
     // when the page cannot be accessed. (Such as during page tear-down.)
     [RaisesException] void setMockScrollbarsEnabled(boolean enabled);
     [RaisesException] void setTouchEventEmulationEnabled(boolean enabled);
     [RaisesException] void setStandardFontFamily(DOMString family, DOMString script);
     [RaisesException] void setSerifFontFamily(DOMString family, DOMString script);
     [RaisesException] void setSansSerifFontFamily(DOMString family, DOMString script);
     [RaisesException] void setFixedFontFamily(DOMString family, DOMString script);
     [RaisesException] void setCursiveFontFamily(DOMString family, DOMString script);
@@ skipping 21 matching lines @@
     // cannot be changed after process start.  These setters should
     // be removed or moved onto internals.runtimeFlags:
     void setAuthorShadowDOMForAnyElementEnabled(boolean enabled);
     void setCSSExclusionsEnabled(boolean enabled);
     void setExperimentalWebSocketEnabled(boolean enabled);
     void setLangAttributeAwareFormControlUIEnabled(boolean enabled);
     void setOverlayScrollbarsEnabled(boolean enabled);
     void setStyleScopedEnabled(boolean enabled);
     void setExperimentalContentSecurityPolicyFeaturesEnabled(boolean enabled);
 };