refactor: remove unnecessary checks in melee decorator (invincibility handled by the player)

Author: GioeleBucci

src/main/java/tbooop/model/enemy/impl/Melee.java

@@ -11,8 +11,6 @@
 public class Melee extends EnemyDecorator {
 
     private static final int DAMAGE_AMOUNT = 1;
-    private static final long TIME_BETWEEN_HITS = 1000;
-    private long timeSinceLastHit;
 
     /**
      * Creates an instance of a Melee decoration.
@@ -27,17 +25,13 @@ protected Melee(final Enemy concreteEnemy) {
     @Override
     public void updateState(final long deltaTime) {
         super.updateState(deltaTime);
-        this.timeSinceLastHit += deltaTime;
     }
 
     /** {@inheritDoc} */
     @Override
     public void onPlayerCollision(final Player player) {
         super.onPlayerCollision(player);
-        if (this.timeSinceLastHit >= TIME_BETWEEN_HITS) {
-            this.timeSinceLastHit = 0;
-            player.takeDamage(DAMAGE_AMOUNT);
-        }
+        player.takeDamage(DAMAGE_AMOUNT);
     }
 
 }