Function cancelScheduledCallback

cancelScheduledCallback(handle: IdleCallbackHandle): void
Cancels a callback scheduled with scheduleIdleCallback. Works with both requestIdleCallback and setTimeout fallback.
Parameters
- handle: IdleCallbackHandle
  The handle returned by scheduleIdleCallback
Returns void
Example
```
const handle = scheduleIdleCallback(() => {
  console.log('This might not run');
});

cancelScheduledCallback(handle);
```