Revert "Move mockTool into test-utils (#7245)" (#7277)

packages/a2a-server/package.json

@@ -34,7 +34,6 @@
   },
   "devDependencies": {
     "@types/express": "^5.0.3",
-    "@google/gemini-cli-test-utils": "file:../test-utils",
     "@types/fs-extra": "^11.0.4",
     "@types/supertest": "^6.0.3",
     "@types/tar": "^6.1.13",

packages/a2a-server/src/agent.test.ts

@@ -33,7 +33,7 @@ import {
   assertTaskCreationAndWorkingStatus,
   createStreamMessageRequest,
 } from './testing_utils.js';
-import { MockTool } from '@google/gemini-cli-test-utils';
+import { MockTool } from '@google/gemini-cli-core';
 
 const mockToolConfirmationFn = async () =>
   ({}) as unknown as ToolCallConfirmationDetails;