[css-anchor-position] Remove issue, Elika agrees only scroll/contain clipping should apply

Author: tabatkins

css-anchor-position-1/Overview.bs

@@ -1091,10 +1091,6 @@ where this could be the case.
 	or being clipped to its [=overflow clip edge=]
 	(such as by ''overflow: clip'' or [=paint containment=]).
 
-	Issue: Should any other clipping matter?
-	The 'clip'/'clip-path'/'mask' properties?
-	''opacity: 0''?
-
 	Note: This means that if an abspos is next to its anchor in the DOM,
 	for example,
 	it'll remain visible even if its default anchor is scrolled off,
@@ -1113,16 +1109,6 @@ where this could be the case.
 	(due to its anchor being scrolled off),
 	then another abspos using it as an anchor will also be hidden,
 	rather than <em>also</em> floating in a nonsensical location.
-
-	Issue: I think we don't want to make this dependent
-	on any <em>other</em> types of invisibility.
-	Anchoring an ''opacity: 0'' element
-	might make sense, for example.
-	This property's hiding is based on dynamic state,
-	which you can't otherwise select on;
-	all of those other sources are caused by other styling,
-	which you can just condition this element on as well
-	if you want to hide it at the same time.
 </div>
 
 Making an element <dfn noexport>strongly hidden</dfn>