Remove additional import from program.

Board.java

-import java.io.IOException;
-
 /**
  * This class represents status of board and update its.
  * @author Rezvanian 9831029
@@ -150,10 +148,8 @@ public class Board implements IBoard  {
     /**
      * this method clear the screen and print the map.
      * */
-    static public void printMap() throws IOException, InterruptedException{
+    static public void printMap() {
 
-        //clear terminal for refresh.
-        new ProcessBuilder("cmd", "/c", "cls").inheritIO().start().waitFor();
         System.out.println();
         System.out.println();
         System.out.println();
@@ -218,17 +214,10 @@ public class Board implements IBoard  {
     /**
      * this method refresh of map
      * */
-    public static void refresh() throws IOException, InterruptedException {
+    public static void refresh(){
         printMap();
     }
 
-    /**
-     * this method check end of the game.
-     * */
-    public static boolean checkEndOfGame(){
-        boolean validate = true;
-        return validate;
-    }
 
     /**
      * this method set value of "visualMap".