docs(campaigns): remove stale docstring reference to deleted scheduling filter

backend/app/services/test_crud_service.py

@@ -47,12 +47,7 @@ def list_tests(
     # Entry: limit
     limit: int = 50,
 ) -> list[Test]:
-    """Return a paginated list of tests with optional filters.
-
-    Tests that belong to a campaign still in 'draft' status AND with a
-    start_date in the future are always excluded — they should not appear
-    in the team's queue until the campaign is activated on its start date.
-    """
+    """Return a paginated list of tests with optional filters."""
     query = db.query(Test).options(joinedload(Test.technique))
 
     # Check: state