remove safety migration

backend/migrations/20251006143821_ducklake_instance_settings_safety_migration.up.sql

@@ -1,27 +0,0 @@
--- Copy of 20250731132157_ducklake_instance_settings.up.sql
--- Pushing a instance_settings.yaml without ducklake_user_pg_pwd will remove it from the global settings
--- And the next migration will fail because it will try to insert a NULL value
-
-INSERT INTO global_settings (name, value)
-VALUES ('ducklake_user_pg_pwd', ('"' || gen_random_uuid()::text || '"')::jsonb)
-ON CONFLICT DO NOTHING;
-
--- Cannot simply create the user because Postgres expect a static string for the password
--- Also we cannot drop the user easily in the down migration because databases will depend on it
--- And we cannot drop databases in transactions (migrations)
-
-DO $$
-DECLARE
-    pwd text;
-BEGIN
-    SELECT trim(both '"' from value::text) INTO pwd FROM global_settings WHERE name = 'ducklake_user_pg_pwd';
-    IF NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'ducklake_user') THEN
-        EXECUTE format('CREATE USER ducklake_user WITH PASSWORD %L', pwd);
-    ELSE
-      EXECUTE format('ALTER USER ducklake_user WITH PASSWORD %L', pwd);
-    END IF;
-EXCEPTION
-  WHEN others THEN
-    RAISE NOTICE 'ducklake_user migration error, skipping.';
-END
-$$;