Deletion of unused function

ipranges.py

@@ -11,7 +11,6 @@ import socket
 import struct
 import numbers
 import sys
-import operator
 
 try:
     basestring
@@ -148,14 +147,6 @@ class IPNetBase(IPBase):
     def __hash__(self):
         return hash((self.base, self.mask))
 
-def check_types(f):
-    def wrapper(a, b):
-        raise RuntimeError("AAAa")
-        if not isinstance(b, type(a)):
-            return NotImplemented
-        else:
-            return f(a, b)
-
 _opperations = {'__lt__': '<', '__le__': '<=', '__gt__': '>', '__ge__': '>='}
 
 class IPAddrBase(IPBase):