Disable flaky test (#2711)

Summary:
Pull Request resolved: https://github.com/facebook/flipper/pull/2711

See failure in T98765066. Disabling for now.

Reviewed By: nikoant

Differential Revision: D30481963

fbshipit-source-id: 555295bbab33629250b53a194de37038fea2198a

desktop/app/src/utils/__tests__/Idler.node.tsx

@@ -29,7 +29,8 @@ test('Idler should interrupt', async () => {
   }
 });
 
-test('Idler should want to idle', async () => {
+// TODO(T98901996): Re-enable with flakiness fixed.
+test.skip('Idler should want to idle', async () => {
   const idler = new IdlerImpl(100);
   expect(idler.shouldIdle()).toBe(false);
   await sleep(10);