diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index bd004350dd..fcfdf8bd2b 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -77,13 +77,6 @@ class Codes(object):
     INVALID_SIGNATURE = "M_INVALID_SIGNATURE"
     USER_DEACTIVATED = "M_USER_DEACTIVATED"
     BAD_ALIAS = "M_BAD_ALIAS"
-    PASSWORD_TOO_SHORT = "M_PASSWORD_TOO_SHORT"
-    PASSWORD_NO_DIGIT = "M_PASSWORD_NO_DIGIT"
-    PASSWORD_NO_UPPERCASE = "M_PASSWORD_NO_UPPERCASE"
-    PASSWORD_NO_LOWERCASE = "M_PASSWORD_NO_LOWERCASE"
-    PASSWORD_NO_SYMBOL = "M_PASSWORD_NO_SYMBOL"
-    PASSWORD_IN_DICTIONARY = "M_PASSWORD_IN_DICTIONARY"
-    WEAK_PASSWORD = "M_WEAK_PASSWORD"
 
 
 class CodeMessageException(RuntimeError):