Remove GarbageCollected support from the bindings

sky/engine/bindings/scripts/v8_utilities.py

 # 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 251 matching lines @@
         exposure_checks.append('context->%s()' % EXPOSED_EXECUTION_CONTEXT_METHOD[environment])
 
     return ' || '.join(exposure_checks)
 
 
 def expanded_exposure_set_for_interface(interface):
     exposure_set = extended_attribute_value_as_list(interface, 'Exposed')
     return sorted(set(exposure_set))
 
 
-# [GarbageCollected], [WillBeGarbageCollected]
-def gc_type(definition):
-    extended_attributes = definition.extended_attributes
-    if 'GarbageCollected' in extended_attributes:
-        return 'GarbageCollectedObject'
-    elif 'WillBeGarbageCollected' in extended_attributes:
-        return 'WillBeGarbageCollectedObject'
-    return 'RefCountedObject'
-
-
 # [ImplementedAs]
 def cpp_name(definition_or_member):
     extended_attributes = definition_or_member.extended_attributes
     if 'ImplementedAs' not in extended_attributes:
         return definition_or_member.name
     return extended_attributes['ImplementedAs']
 
 
 # [MeasureAs]
 def measure_as(definition_or_member):
@@ skipping 10 matching lines @@
 
     The returned function checks if a method/attribute is enabled.
     Given extended attribute RuntimeEnabled=FeatureName, return:
         RuntimeEnabledFeatures::{featureName}Enabled
     """
     extended_attributes = definition_or_member.extended_attributes
     if 'RuntimeEnabled' not in extended_attributes:
         return None
     feature_name = extended_attributes['RuntimeEnabled']
     return 'RuntimeEnabledFeatures::%sEnabled' % uncapitalize(feature_name)