style(controller): clean up unused variables

src/main/java/de/hdm_stuttgart/battlearena/Controller/MainMenuController.java

 package de.hdm_stuttgart.battlearena.Controller;
 
 import javafx.fxml.FXML;
-import javafx.fxml.Initializable;
-import javafx.geometry.Rectangle2D;
 import javafx.scene.control.Button;
-import javafx.scene.image.ImageView;
-import javafx.scene.layout.BorderPane;
-import javafx.scene.layout.Pane;
 import javafx.scene.layout.VBox;
-import javafx.stage.Screen;
 import javafx.stage.Stage;
 
-import java.net.URL;
-import java.util.ResourceBundle;
-
 public class MainMenuController {
     @FXML
     public VBox parent;
     @FXML
     public Button exitButton;
-    public static Pane center;
     private final SceneLoader sceneLoader = new SceneLoader();
 
     public void playScene() {

src/main/java/de/hdm_stuttgart/battlearena/Controller/MenuBorderPaneController.java

@@ -35,7 +35,7 @@ public class MenuBorderPaneController implements Initializable {
 
     public void easterEgg() {
         btnRight.setOnMouseClicked(mouseEvent -> counter++);
-        if (counter == 5) {
+        if (counter == 4) {
 //            TODO: implement something stupid
             System.out.println("monke");
         }