Remove useless events and useEffect block.

Author: Kuznietsov

src/plugins/expression_reveal_image/public/components/reveal_image_component.tsx

@@ -62,13 +62,6 @@ function RevealImageComponent({
     }
   }, [imgRef, handlers]);
 
-  useEffect(() => {
-    handlers.done();
-    return () => {
-      handlers.event({ name: 'destroy' });
-    };
-  }, [handlers]);
-
   useEffect(() => {
     updateImageView();
   }, [parentNodeDimensions, updateImageView]);