Removed unused reference in docs/ref/utils.txt.
Unused since
@@ -724,8 +724,6 @@ escaping HTML.
Converts a positive integer to a base 36 string.
- .. _sys.maxint: https://docs.python.org/2/library/sys.html#sys.maxint
-
.. function:: urlsafe_base64_encode(s)
Encodes a bytestring in base64 for use in URLs, stripping any trailing
