Fix gift card delete route (#27)

* Fix gift card delete route

* Fix doc string

Author: mbektimirov

src/api/cart.js

@@ -171,11 +171,11 @@ export default class Cart {
   }
 
   /**
-   * @method removeGiftCards(): Promise<FullOrder>
-   * Removes all gift cards payment methods of the cart.
+   * @method removeGiftCard(giftCardCode: string): Promise<FullOrder>
+   * Removes gift card with provided code payment method from the cart.
    */
-  removeGiftCards() {
-    return this.api.delete(endpoints.cartPaymentGiftCards).then(normalizeResponse);
+  removeGiftCard(giftCardCode) {
+    return this.api.delete(endpoints.cartPaymentGiftCardsWithCode(giftCardCode)).then(normalizeResponse);
   }
 
   /**

src/endpoints.js

@@ -22,6 +22,7 @@ export const shippingAddressId = id => `${shippingAddress}/${id}`;
 export const cartLineItems = '/v1/my/cart/line-items';
 export const cartPaymentCreditCarts = '/v1/my/cart/payment-methods/credit-cards';
 export const cartPaymentGiftCards = '/v1/my/cart/payment-methods/gift-cards';
+export const cartPaymentGiftCardsWithCode = giftCardCode => `/v1/my/cart/payment-methods/gift-cards/${giftCardCode}`;
 export const cartPaymentStoreCredits = '/v1/my/cart/payment-methods/store-credits';
 export const cartPaymentCouponCode = '/v1/my/cart/coupon';
 export const cartPaymentCouponCodeWithCode = code => `/v1/my/cart/coupon/${code}`;