Remove import of c-versions of POINTER and pointer

Author: sergey-miryanov

Lib/ctypes/__init__.py

@@ -265,8 +265,6 @@ class c_void_p(_SimpleCData):
 class c_bool(_SimpleCData):
     _type_ = "?"
 
-from _ctypes import POINTER, pointer, _pointer_type_cache
-
 def POINTER(cls):
     """
     Create and return a new ctypes pointer type.
@@ -304,6 +302,9 @@ def pointer(obj):
     typ = POINTER(type(obj))
     return typ(obj)
 
+_pointer_type_cache = {}
+"""XXX: Subject to change."""
+
 class c_wchar_p(_SimpleCData):
     _type_ = "Z"
     def __repr__(self):