Fix syntax error (not part of build).

mailnews/extensions/bayesian-spam-filter/menuOverlay.js

@@ -37,7 +37,6 @@
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
- */
 
 const nsIMsgDBHdr       = Components.interfaces.nsIMsgDBHdr;