Removes the given surface (page) from the product.
example
editor.getProduct()
.then(function (product) {
// Remove the current surface.
product.removeSurface(product.currentSurface)
.then(function(result) {
console.log("Surface removed");
});
})
// If there was an error thrown while removing the surface.
.catch(function (error) {
console.error("Removing the surface failed with exception: ", error);
});