[css-position-4][editorial] Invoke the removal algorithm rather than duplicating some text. whatwg/html#11246 (comment)

Author: tabatkins

css-position-4/Overview.bs

@@ -619,8 +619,7 @@ Top Layer Manipulation {#top-manip}
 	1. For each element |el| in |doc|'s [=pending top layer removals=]:
 		if |el|'s computed value of 'overlay' is ''none'',
 		or |el| is [=not rendered=],
-		[=set/remove=] |el| from |doc|'s [=Document/top layer=]
-		and [=pending top layer removals=].
+		[=remove from the top layer immediately=] |el|.
 
 	Note: This is intended to be called during the "Update the Rendering" step
 	of HTML's rendering algorithm.
@@ -720,4 +719,4 @@ remove a running [=transition=] on 'overlay'.
 The conditions for this are intentionally undefined.
 <span class=note>(This is to prevent potential abuse scenarios
 where a ''transition: overlay 1e9s;'' or similar
-attempts to keep an element in the [=Document/top layer=] permanently.)</span>
+attempts to keep an element in the [=Document/top layer=] permanently.)</span>