Remove all mentions of GraphQL

[NoSQLKnowHow]

GraphQL is mentioned in the following files and needs to be removed as it is no longer supported:

• README.md
• src/lib/config/root-config.ts
• src/commands/upload-graphql-schema.js
• src/lib/config/index.ts
• test/commands/endpoint.test.ts
• yarn.lock

[echo-bravo-yahoo]

can't remove the reference in yarn.lock (we take a dependency on oclif, which takes a transitive dependency on @octokit/graphql):

~/w/fa/fauna-shell no-graph-ql  yarn why @octokit/graphql
yarn why v1.22.22
[1/4] 🤔  Why do we have the module "@octokit/graphql"...?
[2/4] 🚚  Initialising dependency graph...
[3/4] 🔍  Finding dependency...
[4/4] 🚡  Calculating file sizes...
=> Found "@octokit/[email protected]"
info Reasons this module exists
   - "oclif#yeoman-generator#github-username#@octokit#rest#@octokit#core" depends on it
   - Hoisted from "oclif#yeoman-generator#github-username#@octokit#rest#@octokit#core#@octokit#graphql"
info Disk size without dependencies: "112KB"
info Disk size with unique dependencies: "716KB"
info Disk size with transitive dependencies: "3.68MB"
info Number of shared dependencies: 8
✨  Done in 0.18s.