docs: remove redundant 'worklet'; in useComposedEventHandler (#6078)

This PR removes redundant "worklet"; directive in
`useComposedEventHandler` docs.

`onScroll` callbacks in `useAnimatedScrollHandler` are automatically
workletized by our babel plugin.

packages/docs-reanimated/docs/advanced/useComposedEventHandler.mdx

@@ -17,14 +17,12 @@ import Animated, {
 function ComposedEventHandlerExample() {
  const onScrollHandler1 = useAnimatedScrollHandler({
  onScroll(e) {
- 'worklet';
  console.log('Scroll handler 1 onScroll event');
  },
  });
 
  const onScrollHandler2 = useAnimatedScrollHandler({
  onScroll(e) {
- 'worklet';
  console.log('Scroll handler 2 onScroll event');
  },
  });