Remove editors/show.html.erb when graphiql-rails supports nonce-based CSP
Follow up of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/32882/:
We need to remove app/views/graphiql/rails/editors/show.html.erb when https://github.com/rmosolgo/graphiql-rails/pull/71 is released
Edited by Stan Hu