refactor(blackjack): remove unnecessary comments and clean code

frontend/src/app/feature/game/blackjack/components/dealer-hand/dealer-hand.component.ts

@@ -48,13 +48,11 @@ export class DealerHandComponent implements OnChanges {
     const newCards = this.cards.length > this.lastCardCount;
 
     this.cardsWithState = this.cards.map((card, index) => {
-      // Consider a card new if it's added after the initial state and is the latest card
       const isNew = newCards && index >= this.lastCardCount;
 
       return {
         ...card,
         isNew,
-        // Generate a unique ID to help Angular track the cards
         id: `${card.suit}-${card.rank}-${index}`,
       };
     });