fix: correct checkoutLinesDelete parameter name lines -> lineIds

src/lib/saleor/mutations/Checkout.ts

@@ -51,7 +51,7 @@ export const CHECKOUT_LINES_UPDATE = gql`
 
 export const CHECKOUT_LINES_DELETE = gql`
   mutation CheckoutLinesDelete($checkoutId: ID!, $lineIds: [ID!]!) {
-    checkoutLinesDelete(checkoutId: $checkoutId, lines: $lineIds) {
+    checkoutLinesDelete(checkoutId: $checkoutId, lineIds: $lineIds) {
       checkout {
         ...CheckoutFragment
       }