[css-grid-3][editorial] Remove issue now that it's resolved.

Author: tabatkins

css-grid-3/Overview.bs

@@ -1223,7 +1223,6 @@ Stacking-axis Self Alignment: the 'align-self'/'justify-self' and 'align-items'/
 		</figcaption>
 	</figure>
 
-	ISSUE(10275): Is this a reasonable definition for how the [=self-alignment properties=] should work in the [=stacking axis=]?
 
 <h3 id="grid-lanes-baseline-alignment" oldids="masonry-baseline-alignment">
 Baseline Alignment</h3>