[css-scroll-snap] Removing 'trapping' behavior from value definitions since it's more thoroughly defined in the following paragraph, and the terminology 'trapping' is inconsistent with 'capturing' used throughout the rest of the document

Author: ChumpChief

css-scroll-snap/Overview.bs

@@ -270,21 +270,13 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
 
             If the content changes such that the scroll container would no longer be <a>snapped</a> (e.g. content is added, moved, deleted, resized) to the same snap position it was snapped to before the content change, the scroll container must be re-snapped.  If the same snap position it was snapped to before the content change still exists (e.g. its associated element was not deleted) and is reachable, the scroll container must be re-snapped to that same snap position after the content change.
 
-            If specified on a non-<a>scroll container</a>,
-            this value "traps" descendant boxes' <a>snap positions</a>,
-            preventing them from affecting any ancestor <a>scroll containers</a>.
-
         <dt><dfn>proximity</dfn>
         <dd>
             If specified on a <a>scroll container</a>, the <a>scroll container</a> may <a>snap</a> to a snap position at the termination of a scroll, at the discretion of the UA given the parameters of the scroll.
 
             If the content changes such that the scroll container would no longer be <a>snapped</a> (e.g. content is added, moved, deleted, resized) to the same snap position it was snapped to before the content change and that same snap position still exists (e.g. its associated element was not deleted) and is reachable, the scroll container must be re-snapped to that same snap position after the content change.
 
             Issue: The text for mandatory and proximity resnapping requirements has some overlap -- try to rewrite this more concisely and without repetition without altering functionality
-
-            If specified on a non-<a>scroll container</a>,
-            this value "traps" descendant boxes' <a>snap positions</a>,
-            preventing them from affecting any ancestor <a>scroll containers</a>.
     </dl>
 
     A box <dfn export>captures snap positions</dfn>