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/text2html.py

@@ -9,8 +9,6 @@ snippet #577349 on http://code.activestate.com.
 (extensively modified by Griatch 2010)
 """
 
-from builtins import object
-
 import re
 import cgi
 from .ansi import *