[css-grid-1] Remove duplicated for-each quantifier. w3c#4544

Author: Loirooriol

css-grid-1/Overview.bs

@@ -4434,7 +4434,6 @@ Expand Flexible Tracks</h3>
 					For each [=grid item=] that crosses a flexible track,
 					the result of
 					<a href="#algo-find-fr-size">finding the size of an fr</a>
-					for each <a>grid item</a> that crosses a flexible track,
 					using all the grid tracks that the item crosses
 					and a <a>space to fill</a> of the item's <a>max-content contribution</a>.
 			</ul>