Remove builtins imports

This module is not intended to be used directly in most cases, per:
https://docs.python.org/3/library/builtins.html

None of our usages warrant the explicit import. We also avoid some
confusion as folks dig to see what we are doing to require
importing builtins directly.

evennia/utils/evform.py

@@ -129,8 +129,6 @@ form will raise an error.
 
 """
 
-from builtins import object, range
-
 import re
 import copy
 from evennia.utils.evtable import EvCell, EvTable