[css-overflow-4] Remove stale inline issue

Author: frivoal

css-overflow-4/Overview.bs

@@ -847,8 +847,6 @@ Limiting Visible Lines: the 'line-clamp' shorthand property</h3>
 		<dt><dfn><'block-ellipsis'></dfn>
 		<dd>
 
-			Issue(7708): Whether this should imply ''discard'' or ''collapse'' is an unresolved question.
-
 			Sets 'continue' to ''collapse''
 			if either or both values are specified,
 			unless the ''line-clamp/-webkit-legacy'' keyword is also specified.