Clear _ranked_dictionaries['user_inputs'] when no user_inputs given

Author: Yann Weber

zxcvbn/matching.py

@@ -100,6 +100,8 @@ def wrapper(*args, **kwargs):
 def omnimatch(password, _ranked_dictionaries=None, user_inputs=[]):
     if len(user_inputs):
         _ranked_dictionaries['user_inputs'] = build_ranked_dict(user_inputs)
+    elif 'user_inputs' in _ranked_dictionaries:
+        del(_ranked_dictionaries['user_inputs'])
 
     matches = []
     for matcher in [