Remove accidentally retained JavaDoc row

The offending row was not removed when the proceeding "@throws
JSONException" row was removed.

Change-Id: I38d914284d92554540744e8c52eefa0db78bc55d

server/src/com/vaadin/server/ClientConnector.java

 import com.vaadin.shared.communication.SharedState;
 import com.vaadin.ui.UI;
 import com.vaadin.util.ReflectTools;
+
 import elemental.json.JsonObject;
 
 /**
      * .
      * 
      * @return a JSON object with the encoded connector state
-     *             if the state can not be encoded
      */
-    public JsonObject encodeState() ;
+    public JsonObject encodeState();
 
     /**
      * Handle a request directed to this connector. This can be used by