[css-grid] Never mind, we fixed that issue already.

Author: tabatkins

css-grid/Overview.bs

@@ -3487,8 +3487,6 @@ Find the Size of an ''fr''</h4>
 			Return the <a>hypothetical fr size</a>.
 	</ol>
 
-	Issue: This doesn't yet handle the 0->1 transition properly, like Flexbox does.  Fix it.
-
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