Remove duplicate ids when on create_multi_ids_permission.

Author: benwoo1110

discord_slash/utils/manage_commands.py

@@ -347,7 +347,7 @@ def create_multi_ids_permission(ids: typing.List[int], id_type: int, permission:
     :param id_type: Type of the id. 
     :param permission: State of the permission. ``True`` to allow access, ``False to disallow access.
     """
-    return [create_permission(id, id_type, permission) for id in ids]
+    return [create_permission(id, id_type, permission) for id in set(ids)]
 
 
 def generate_permissions(