Fixed broken JavaDoc and removed unused import

core/src/main/java/ch/dissem/bitmessage/BitmessageContext.java

@@ -242,7 +242,6 @@ public class BitmessageContext {
      * <li>Other than that, the call isn't expensive as long as there is no message
      * to send, so it might be a good idea to just call it every few minutes.</li>
      * </ul>
-     * </p>
      */
     public void resendUnacknowledgedMessages() {
         ctx.resendUnacknowledged();

core/src/main/java/ch/dissem/bitmessage/entity/payload/ObjectPayload.java

@@ -18,7 +18,6 @@ package ch.dissem.bitmessage.entity.payload;
 
 import ch.dissem.bitmessage.entity.ObjectMessage;
 import ch.dissem.bitmessage.entity.Streamable;
-import sun.reflect.generics.reflectiveObjects.NotImplementedException;
 
 import java.io.IOException;
 import java.io.OutputStream;