[cssom-view] Remove issue fixed by last commit.

Author: tabatkins

cssom-view/Overview.bs

@@ -555,8 +555,6 @@ steps must be run:
 	<var>document</var>'s root element as the associated element, if there is one, or null otherwise,
 	and the scroll behavior being the value of the {{ScrollOptions/behavior}} dictionary member of <var>options</var>.
 
-	Issue: {{ScrollToOptions}} doesn't have a "behavior" member. What is intended here?
-
 When the <dfn method for=Window title="scrollTo(options)|scrollTo(x, y)">scrollTo()</dfn> method is invoked, the
 user agent must act as if the {{Window/scroll()}} method was invoked with the same arguments.