buildApolloGraphqlContainer - investigate do we still need to implement logic of scaffold() function

[sabina-talipova]

Description

There is a function scaffold() in buildApolloGraphqlContainer.js that currently throws the new Error, because this function doesn't have any implementation. We should investigate, do we still need this function and should we implement it.

See:

silverstripe-admin/client/src/lib/dependency-injection/buildApolloGraphqlContainer.js

Lines 36 to 42 in 0f18b3d

	* @todo build out scaffolding
	* I would recommend adding a default mutation update handlers here, instead of in the `register` method.
	* This way query and mutation could be potentially be linked more easily.
	* Config schema could be found in the `GraphqlManager.js` file.
	*
	* Proof-of-concept for handlers could be found here:
	* https://github.com/flamerohr/silverstripe-graphql-react-boilerplate/tree/master/client/src/js/lib/graphql