When removing an item from the customer cart, the delivery fee returns 0, when the merchant is actually charging a fee.
1. Go to merchant: GET /merchant/59041/menu?client_id=[CLIENT_ID]
2. Add items to the cart: POST /customer/cart/59041?client_id=[CLIENT_ID] (I added multiple items so that the cart would not be empty when removing an item)
3. Remove an item from the cart DELETE /customer/cart/59041?client_id=[CLIENT_ID]
The response returned when removing the item results in the "delivery_fee" property equal to 0, and the "fees" array being empty.