Updated the docs of set_event_bubbling (#3391)

The removed paragraph describes a caveat of the framework which is no longer true

packages/yew/src/dom_bundle/subtree_root.rs

@@ -286,10 +286,6 @@ static BUBBLE_EVENTS: AtomicBool = AtomicBool::new(true);
 /// Bubbling is enabled by default. Disabling bubbling can lead to substantial improvements in event
 /// handling performance.
 ///
-/// Note that yew uses event delegation and implements internal even bubbling for performance
-/// reasons. Calling `Event.stopPropagation()` or `Event.stopImmediatePropagation()` in the event
-/// handler has no effect.
-///
 /// This function should be called before any component is mounted.
 #[cfg(feature = "csr")]
 pub fn set_event_bubbling(bubble: bool) {