[css-display] Revert to ED

Author: fantasai

css-display/Overview.bs

@@ -1,8 +1,7 @@
 <h1>CSS Display Module Level 3</h1>
 
 <pre class='metadata'>
-Status: WD
-Date: 2015-07-21
+Status: ED
 Work Status: Revising
 ED: http://dev.w3.org/csswg/css-display/
 Shortname: css-display