[css-font-loading] Remove extraneous class.

--HG--
extra : rebase_source : c97b044c30be212217900c8416cba284df24ed35

Author: tabatkins

css-font-loading/Overview.bs

@@ -111,7 +111,7 @@ The <code>FontFace</code> Interface</h2>
 	Can we rename that value?
 	Media stuff uses "none", other APIs use "empty", "idle", "nothing".
 
-	<div dfn-type=attribute dfn-for=FontFace class="idl">
+	<div dfn-type=attribute dfn-for=FontFace>
 		: <dfn>family</dfn>
 		: <dfn>style</dfn>
 		: <dfn>weight</dfn>
@@ -431,7 +431,7 @@ The <code>FontFaceSet</code> Interface</h2>
 		};
 	</pre>
 
-	<div class=idl dfn-for="FontFaceSet">
+	<div dfn-for="FontFaceSet">
 		: <dfn attribute>ready</dfn>
 		:: This attribute reflects the {{FontFaceSet}}'s {{[[ReadyPromise]]}} slot.