Update Performance.md

docs/Performance.md

@@ -205,7 +205,7 @@ should continue to render rows.
 "When true, offscreen child views (whose `overflow` value is `hidden`)
 are removed from their native backing superview when offscreen.  This
 can improve scrolling performance on long lists. The default value is
-`true`."(note:before version 0.14-rc, the default value is `false`).
+`true`."(The default value is `false` before version 0.14-rc).
 
 This is an extremely important optimization to apply on large ListViews.
 On Android the `overflow` value is always `hidden` so you don't need to