fix(tests): drop the repo's only bare vi.mock automock

A bare vi.mock('drizzle-orm') automock colliding with factory mocks of the
same module in a shared worker corrupts vitest's mock registry (upstream
vitest-dev/vitest#10290 / #10145, reproduced in isolation). The global
factory mock already covers this suite.

Author: waleedlatif1

apps/sim/app/api/knowledge/search/utils.test.ts

@@ -9,8 +9,6 @@ import { afterAll, afterEach, beforeEach, describe, expect, it, vi } from 'vites
 import { env } from '@/lib/core/config/env'
 import * as documentsUtilsModule from '@/lib/knowledge/documents/utils'
 
-vi.mock('drizzle-orm')
-
 /**
  * Spy on the real documents/utils namespace instead of vi.mock: the shared
  * `@/lib/knowledge/embeddings` module may be cached bound to the real module,