chore(test): remove unused beforeEach import in gateway-recovery.test (NVIDIA#6320)

Advisor in-scope cleanup: `beforeEach` was left over from the earlier
vi.useFakeTimers approach that the virtual-clock refactor replaced.
Not used anywhere in the file.

Signed-off-by: Charan Jagwani <cjagwani@nvidia.com>

Author: cjagwani

src/lib/onboard/gateway-recovery.test.ts

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, describe, expect, it, vi } from "vitest";
 
 import { type GatewayRecoveryDeps, startGatewayForRecovery } from "./gateway-recovery";