Remove outdated liquid reference (#349)

Author: markmur

README.md

@@ -67,8 +67,6 @@ experiences.
 - **React Native** - Minimum version `0.70`
 - **iOS** - Minimum version iOS 13
 - **Android** - Minimum Java 11 & Android SDK version `23`
-- **Shopify** - This package is _**not**_ compatible with checkout.liquid. Your
-  Shopify Store must be migrated for extensibility.
 
 ## Getting Started
 

modules/@shopify/checkout-sheet-kit/src/errors.d.ts

@@ -23,7 +23,6 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SO
 
 export enum CheckoutErrorCode {
   storefrontPasswordRequired = 'storefront_password_required',
-  checkoutLiquidNotMigrated = 'checkout_liquid_not_migrated',
   cartExpired = 'cart_expired',
   cartCompleted = 'cart_completed',
   invalidCart = 'invalid_cart',