fix: remove unused variable in annotation test

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yeldarby

tests/cli/test_annotation_handler.py

@@ -105,7 +105,7 @@ def test_json_output(self, _resolve, mock_api):
 
     @patch(_RESOLVE, return_value=None)
     def test_resolve_failure(self, _resolve):
-        result = runner.invoke(app, ["annotation", "batch", "list", "-p", "bad"])
+        runner.invoke(app, ["annotation", "batch", "list", "-p", "bad"])
         # Should not crash when resolve returns None