Issue-669: Seciton 9.15.3 remove incorrect reference to MB Field in Well-Known Text parseing step (#671)

Author: johntalton

index.html

@@ -4143,7 +4143,7 @@ <h3>Parsing content</h3>
         Set |record|'s <a>lang</a> to |language|.
       </li>
       <li>
-        Set |record|'s <a>encoding</a> be "`utf-8`" if bit `7` ([=MB field=]) of
+        Set |record|'s <a>encoding</a> be "`utf-8`" if bit `7` of
         |header| is equal to the value `0`, or else "`utf-16be`".
       </li>
       <li>