[indexes] Mark the spec as not being leveled. Fixes #3159.

tabatkins · tabatkins · commit 1dec71cdefbc · 2018-09-28T15:18:07.000-07:00
diff --git a/indexes/Overview.bs b/indexes/Overview.bs
@@ -1,7 +1,7 @@
 <pre class=metadata>
 Title: CSS Indexes
 Shortname: indexes
-Level: 1
+Level: none
 Group: CSSWG
 Status: NOTE
 Date: now
