improve readme

packages/overlayscrollbars-vue/README.md

@@ -145,10 +145,6 @@ const Component = {
       initialize({ target: div.value });
     });
 
-    onUnmounted(() => {
-      instance().destroy();
-    });
-
     return () => <div ref={div} />
   },
 }
@@ -156,6 +152,8 @@ const Component = {
 
 The composable is for advanced usage and lets you control the whole initialization process. This is useful if you want to integrate it with other plugins.
 
+The composable will destroy the instance automatically if the component unmounts.
+
 ### Parameters
 
 Parameters are optional and similar to the `OverlayScrollbarsComponent`.