refactoring: combined both ghost move functions into one

src/main/java/pacmanGame/Ghost.java

@@ -17,14 +17,11 @@ public class Ghost {
         this.position = newPosition;
     }
 
-    public void move(Vector2 direction) {
-        this.position = this.position.Add(direction);
-    }
-    
     public void spawn() {
     	this.position = gameManager.map.ghostSpawns[ghostNumber].Clone();
     }
+    
     public void move() {
-    	move(behavior.GetDirection(this));
+    	this.position = this.position.Add(behavior.GetDirection(this));
     }
 }