Reorder imports.

radicale/rights/__init__.py

@@ -32,13 +32,10 @@ Take a look at the class ``BaseRights`` if you want to implement your own.
 
 """
 
-from typing import Sequence
+from typing import Sequence, Set
 
 from radicale import config, utils
 
-from typing import Set
-
-
 INTERNAL_TYPES: Sequence[str] = ("authenticated", "owner_write", "owner_only",
                                  "from_file")