[css-grid] Remove dangling 1fr min text per https://lists.w3.org/Archives/Public/www-style/2016May/0116.html

Author: fantasai

css-grid/Overview.bs

@@ -3588,11 +3588,13 @@ Resolve Intrinsic Track Sizes</h3>
 	evenly distributing the extra space across those tracks
 	insofar as possible.
 
+<!--
 	When the <a>grid container</a> is being sized under a <a>min-content constraint</a>,
 	a track with a flexible <a>min track sizing function</a>
 	is treated as if its <a>min track sizing function</a> was ''min-content''
 	for the purposes of this step.
 	<span class='issue'>This seems correct, but should be checked because it wasn't in the original algorithm.</span>
+-->
 
 	Note: There is no single way to satisfy these constraints
 	when items span across multiple tracks.