[css-overflow-3] Fix changes list

Author: fantasai

css-overflow-3/Overview.bs

@@ -1695,9 +1695,6 @@ Changes from the <a href="https://www.w3.org/TR/2021/WD-css-overflow-3-20211202/
 		this was previously optional for [=block containers=] with ''align-content/normal'' [=content distribution=],
 		pending Web-compatibility investigations.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/129#issuecomment-1113489051">Issue 129</a>)
-	* Extended 'overflow' to apply to [=replaced elements=].
-		How exactly this works is still <a href="https://github.com/w3c/csswg-drafts/issues/7144">still under discussion</a>.
-		(<a href="https://github.com/w3c/csswg-drafts/issues/7144">Issue 7144</a>)
 	* More precisely define the interaction of '-webkit-line-clamp'
 		and the various 'line-clamp' longhands. See [[#webkit-line-clamp]].
 		(<a href="https://github.com/w3c/csswg-drafts/issues/6842">Issue 6842</a>)