fix: remove unused imports and format after rebase

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: fregataa

src/ai/backend/manager/api/gql/user/resolver/mutation.py

@@ -48,7 +48,10 @@
 from ai.backend.manager.repositories.user.updaters import UserUpdaterSpec
 from ai.backend.manager.services.user.actions.create_user import BulkCreateUserAction
 from ai.backend.manager.services.user.actions.get_user import GetUserAction
-from ai.backend.manager.services.user.actions.modify_user import BulkModifyUserAction, ModifyUserAction
+from ai.backend.manager.services.user.actions.modify_user import (
+    BulkModifyUserAction,
+    ModifyUserAction,
+)
 from ai.backend.manager.services.user.actions.purge_user import BulkPurgeUserAction
 from ai.backend.manager.services.user.types import UserCreateSpec, UserUpdateSpec
 from ai.backend.manager.types import OptionalState, TriState

src/ai/backend/manager/services/user/processors.py

@@ -26,11 +26,8 @@
 )
 from ai.backend.manager.services.user.actions.keypair_ops import (
     IssueMyKeypairAction,
-    IssueMyKeypairActionResult,
     RevokeMyKeypairAction,
-    RevokeMyKeypairActionResult,
     SwitchMyMainAccessKeyAction,
-    SwitchMyMainAccessKeyActionResult,
 )
 from ai.backend.manager.services.user.actions.modify_user import (
     BulkModifyUserAction,