Remove placeholder items

lib/screens/cart/cart_screen.dart

@@ -1,19 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:thesis_shop/bloc/cart_bloc.dart';
 import 'package:thesis_shop/bloc_provider.dart';
-import 'package:thesis_shop/models/cart_item.dart';
-import 'package:thesis_shop/models/product.dart';
 import 'package:thesis_shop/screens/cart/total_price_text.dart';
 import 'package:thesis_shop/widgets/user_switch.dart';
 
 import 'cart_item_list.dart';
 
-const _placeHolderItems = [
-  CartItem(product: Product(title: 'Äpfel', price: 3), amount: 3),
-  CartItem(product: Product(title: 'Äpfel', price: 3), amount: 3),
-  CartItem(product: Product(title: 'Äpfel', price: 3), amount: 3),
-];
-
 class CartScreen extends StatelessWidget {
   const CartScreen({Key? key}) : super(key: key);