ref: Removes an unused function.

modules/xmpp/JingleSessionPC.js

         });
     }
 
-    /**
-     * Returns the video codec configured as the preferred codec on the peerconnection.
-     */
-    getConfiguredVideoCodec() {
-        return this.peerconnection.getConfiguredVideoCodec();
-    }
-
     /**
      * Accepts incoming Jingle 'session-initiate' and should send 'session-accept' in result.
      *