chore(service-automation): drop an unused test import (#14456)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XpTx2tbq3pZRYAdoGt6E6Y

Author: claude

packages/services/service-automation/src/builtin/contained-failure-visibility.test.ts

@@ -19,7 +19,7 @@
 // the THIRD one ownerless, `flag` always succeeding and `notify` failing on the
 // ownerless row.
 
-import { describe, it, expect, beforeEach } from 'vitest';
+import { describe, it, expect } from 'vitest';
 import { AutomationEngine } from '../engine.js';
 import type { NodeExecutor } from '../engine.js';
 import type { AutomationContext } from '@objectstack/spec/contracts';