Delete GraphQL README.md content

Removed the README content for the GraphQL directory.

Author: azariahporras8686-eng

content/graphql/README.md

@@ -1,8 +1 @@
-# GraphQL
 
-The `/content/graphql` directory is where the GitHub GraphQL API docs live!
-
-* The `/content/graphql/guides` and `/content/graphql/overview` directories contain articles that are human-editable.
-* The `/content/graphql/reference` directory contains an article for each GraphQL data type used in the GitHub GraphQL API. This content is generated from the data in `src/graphql/data` and should not be edited by a human. **As a result, we cannot accept contributions to GraphQL API reference content in this repository.**
-
-For more information, see the [`/src/graphql/README.md`](/src/graphql/README.md).