Remove now unused attribute.

tools/dom/scripts/systemnative.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 496 matching lines @@
     # is not virtual and accessing it through Uint8Array pointer
     # would lead to wrong semantics (modulo vs. clamping.)
     dart_element_type = self._DartType(element_type)
 
     if self._HasNativeIndexGetter():
       self._EmitNativeIndexGetter(dart_element_type)
     if self._HasNativeIndexSetter():
       self._EmitNativeIndexSetter(dart_element_type)
 
   def _HasNativeIndexGetter(self):
-    ext_attrs = self._interface.ext_attrs
-    return ('CustomIndexedGetter' in ext_attrs or
-        'NumericIndexedGetter' in ext_attrs)
+    return 'CustomIndexedGetter' in self._interface.ext_attrs
 
   def _EmitNativeIndexGetter(self, element_type):
     dart_declaration = '%s operator[](int index)' % \
         self.SecureOutputType(element_type, True)
     self._GenerateNativeBinding('numericIndexGetter', 2, dart_declaration,
         'Callback', True)
 
   def _HasNativeIndexSetter(self):
     return 'CustomIndexedSetter' in self._interface.ext_attrs
 
@@ skipping 488 matching lines @@
             '    if (Dart_NativeFunction func = $CLASS_NAME::resolver(name, argumentCount))\n'
             '        return func;\n',
             CLASS_NAME=os.path.splitext(os.path.basename(path))[0])
 
 def _IsOptionalStringArgumentInInitEventMethod(interface, operation, argument):
   return (
       interface.id.endswith('Event') and
       operation.id.startswith('init') and
       argument.ext_attrs.get('Default') == 'Undefined' and
       argument.type.id == 'DOMString')