[css-grid] Remove issue about merging grid line names with named grid areas. Half (areas define lines) is done, the other half (lines define areas) is hard/ambiguous.

Author: tabatkins

css-grid/Overview.html

@@ -990,9 +990,6 @@ <h4 data-level=5.1.1 id=named-lines><span class=secno>5.1.1 </span><span class=c
 		</amg></div>
 	</div>
 
-	<p class=issue>
-		Consider merging grid line names with grid field names. See: <a href=http://lists.w3.org/Archives/Public/www-style/2012Sep/0047.html>http://lists.w3.org/Archives/Public/www-style/2012Sep/0047.html</a> for proposal.
-
 
 <h4 data-level=5.1.2 id=repeat-notation><span class=secno>5.1.2 </span><span class=content>
 Repeating Rows and Columns: the <a class=css data-link-type=maybe href=#funcdef-repeat>repeat()</a> notation</span><a class=section-link href=#repeat-notation>§</a></h4>

css-grid/Overview.src.html

@@ -920,9 +920,6 @@ <h4 id='named-lines'>
 		</div>
 	</div>
 
-	<p class="issue">
-		Consider merging grid line names with grid field names. See: <a href="http://lists.w3.org/Archives/Public/www-style/2012Sep/0047.html">http://lists.w3.org/Archives/Public/www-style/2012Sep/0047.html</a> for proposal.
-
 
 <h4 id='repeat-notation'>
 Repeating Rows and Columns: the ''repeat()'' notation</h4>