refactor: remove unused imports and clear image URLs

frontend/src/app/landing/landing.component.ts

@@ -14,7 +14,6 @@ import { Router } from '@angular/router';
 import { Subject, interval, Observable } from 'rxjs';
 import { takeUntil } from 'rxjs/operators';
 import { animate, style, transition, trigger } from '@angular/animations';
-import { default as autoAnimate } from '@formkit/auto-animate';
 
 import { PopupService } from '../services/popup.service';
 import { GameService } from '../services/game.service';

frontend/src/app/services/game.service.ts

@@ -28,7 +28,7 @@ export class GameService {
       id: 'mega-fortune',
       name: 'Mega Fortune Dreams',
       description: '🔥 Progressive Jackpot at €1.2M - Must Drop Today!',
-      imageUrl: 'assets/games/mega-fortune.jpg',
+      imageUrl: '',
       minBet: 0.2,
       maxBet: 100,
       rtp: 96.5,
@@ -45,7 +45,7 @@ export class GameService {
       id: 'lightning-roulette',
       name: 'Lightning Roulette',
       description: '⚡️ 500x Multipliers Active - Hot Streak!',
-      imageUrl: 'assets/games/lightning-roulette.jpg',
+      imageUrl: '',
       minBet: 1,
       maxBet: 500,
       rtp: 97.1,