test(disabled-providers): drop logger mock to fix global mock-module leakage

mock.restore() in afterAll is global in Bun, so the previous attempt to
satisfy mock-module-lifecycle-audit by pairing mock.module('./logger')
with afterAll(() => mock.restore()) tore down mocks owned by other
tests. Concretely, running this file before src/hooks/runtime-fallback
produced 42 cascading fallback test failures.

The logger mock was decorative - tests do not assert log calls, and the
real logger only writes to oh-my-opencode.log in the OS temp dir. Drop
the mock entirely so the audit has nothing to score and other tests
keep their mocks intact.

src/shared/disabled-providers.test.ts

@@ -1,6 +1,6 @@
-import { beforeEach, describe, expect, mock, test } from "bun:test"
+/// <reference types="bun-types" />
 
-mock.module("./logger", () => ({ log: (..._args: unknown[]) => {} }))
+import { beforeEach, describe, expect, test } from "bun:test"
 
 import {
   applyDisabledProviders,