Remove duplicate keys (#330)

Author: Lulalaby

discord/commands/commands.py

@@ -58,11 +58,6 @@
     "ContextMenuCommand",
     "UserCommand",
     "MessageCommand",
-    "command",
-    "application_command",
-    "slash_command",
-    "user_command",
-    "message_command",
     "has_role",
     "has_any_role",
     "is_user",