Fix yaml error

Author: sofietoft

15/umbraco-commerce/.gitbook.yaml

@@ -20,4 +20,3 @@ tutorials/getting-started-with-commerce: tutorials/build-a-store/README.md
 how-to-guides/add-item: tutorials/build-a-store/custom-cart.md
 how-to-guides/update-cart: tutorials/build-a-store/custom-cart.md
 how-to-guides/delete-item: tutorials/build-a-store/custom-cart.md
-tutorials/getting-started-with-commerce: tutorials/build-a-store/README.md