chore(db): drop leftover script-migration test fixture change

Author: TheodoreSpeaks

packages/db/script-migrations/0016_backfill_search_vectors.integration.ts

@@ -28,7 +28,6 @@ describe('search projection upgrade in PostgreSQL', () => {
       'embedding',
       'embedding_search',
       'knowledge_projection_dirty',
-      'workspace_files',
     ]) {
       await admin.unsafe(
         `CREATE TABLE "${schemaName}"."${table}" (LIKE public."${table}" INCLUDING DEFAULTS INCLUDING CONSTRAINTS INCLUDING INDEXES INCLUDING GENERATED)`