Move function to helpers.

Author: WaVEV

django_mongodb/query.py

@@ -1,4 +1,3 @@
-import re
 from functools import wraps
 
 from django.db import DatabaseError, IntegrityError
@@ -19,14 +18,6 @@ def wrapper(*args, **kwargs):
     return wrapper
 
 
-def safe_regex(regex, *re_args, **re_kwargs):
-    def wrapper(value):
-        return re.compile(regex % re.escape(value), *re_args, **re_kwargs)
-
-    wrapper.__name__ = "safe_regex (%r)" % regex
-    return wrapper
-
-
 class MongoQuery:
     """
     Compilers build a MongoQuery when they want to fetch some data. They work