refactor: fix unit tests

Author: John Doe

packages/utils/src/lib/clock-epoch.int.test.ts

@@ -20,16 +20,6 @@ describe('epochClock', () => {
     expect(c.fromDateNowMs).toBeFunction();
   });
 
-  it('should support performance clock by default for epochNowUs', () => {
-    const c = epochClock();
-    expect(c.timeOriginMs).toBe(performance.timeOrigin);
-    const nowUs = c.epochNowUs();
-    expect(nowUs).toBe(Math.round(nowUs));
-    const expectedUs = Date.now() * 1000;
-
-    expect(nowUs).toBeWithin(expectedUs - 2000, expectedUs + 1000);
-  });
-
   it('should convert epoch milliseconds to microseconds correctly', () => {
     const c = epochClock();
     const epochMs = Date.now();