[css-transitions] Remove duplicate ED: metadata.

Author: dbaron

css-transitions/Overview.bs

@@ -15,7 +15,6 @@
 <pre class="metadata">
 Status: ED
 Work Status: Refining
-ED: https://drafts.csswg.org/css-transitions/
 Shortname: css-transitions
 Group: csswg
 Level: 1