feat(FN-4948): complete Steps 7-8 — finalize verification and release artifacts

Fusion-Task-Id: FN-4948
Fusion-Task-Lineage: dc622643-4c3e-4217-9219-a6a6e5424427

packages/engine/src/executor.ts

@@ -8498,19 +8498,6 @@ Backward compat fallback: if JSON is unavailable, you may still begin output wit
       }
     };
 
-    const installGuardOrCleanup = async () => {
-      try {
-        await installTaskWorktreeIdentityGuard({ worktreePath: path, taskId });
-      } catch (error) {
-        try {
-          await execAsync(`rm -rf "${path}"`, { cwd: this.rootDir });
-        } catch {
-          executorLog.log(`Warning: failed to remove worktree after identity-guard install failure: ${path}`);
-        }
-        throw error;
-      }
-    };
-
     let staleLockRecoveryAttempted = false;
     try {
       await createWithBranch(branch);