Removed deprecated fields from Remove Price update action

As announced before we have now removed the variantId, sku and price fields from the Remove Price update action on the Products API. The Price to be removed is now identified by the priceId field, respectively by RemoveProductPrice.priceId in the GraphQL API.

Changes:

• [GraphQL API] Changed the RemoveProductPrice type:
  • Input field variantId was removed from RemoveProductPrice type
  • Input field sku was removed from RemoveProductPrice type
  • Input field price was removed from RemoveProductPrice type