Remove stray imports, fix 1 error

gramps_webapi/api/util.py

@@ -72,8 +72,6 @@
 from gramps.gen.utils.grampslocale import GrampsLocale
 from gramps.plugins.db.dbapi.dbapi import DBAPI
 from marshmallow import RAISE
-from sklearn import tree
-from torch import Value
 from webargs.flaskparser import FlaskParser
 from werkzeug.exceptions import HTTPException
 from werkzeug.security import safe_join

gramps_webapi/dbloader.py

@@ -104,7 +104,7 @@ def get_postgres_credentials(directory, username, password):
 class WebDbSessionManager:
     """Session manager derived from `CLIDbLoader` and `CLIManager`."""
 
-    def __init__(self, dbstate: DbState, user: UserBase, user_id: str):
+    def __init__(self, dbstate: DbState, user: UserBase, user_id: str | None):
         """Initialize self."""
         self.dbstate = dbstate
         self._pmgr = BasePluginManager.get_instance()