Disable using the _abcoll stdlib for now

As much as I don't like modifying the standard libraries,
removing the dependence on this particular one helps a lot,
since it (indirectly) imports weakref which will take a while
for us to support.

lib_python/2.7/UserDict.py

@@ -80,8 +80,9 @@ class IterableUserDict(UserDict):
     def __iter__(self):
         return iter(self.data)
 
-import _abcoll
-_abcoll.MutableMapping.register(IterableUserDict)
+# Pyston change: disable using the _abcoll module for now.
+# import _abcoll
+# _abcoll.MutableMapping.register(IterableUserDict)
 
 
 class DictMixin:

lib_python/2.7/_abcoll.py

 # Copyright 2007 Google, Inc. All Rights Reserved.
 # Licensed to PSF under a Contributor Agreement.
 
+# Pyston change: disable using the _abcoll module for now.
+raise NotImplementedError()
+
 """Abstract Base Classes (ABCs) for collections, according to PEP 3119.
 
 DON'T USE THIS MODULE DIRECTLY!  The classes here should be imported

lib_python/2.7/collections.py

 __all__ = ['Counter', 'deque', 'defaultdict', 'namedtuple', 'OrderedDict']
 # For bootstrapping reasons, the collection ABCs are defined in _abcoll.py.
 # They should however be considered an integral part of collections.py.
-from _abcoll import *
-import _abcoll
-__all__ += _abcoll.__all__
+# Pyston change: disable using the _abcoll module for now.
+# from _abcoll import *
+# import _abcoll
+# __all__ += _abcoll.__all__
 
 from _collections import deque, defaultdict
 from operator import itemgetter as _itemgetter, eq as _eq