Remove `require: false`
Remove `require: false`

`require: false` is used by Rails to specify that a gem shouldn't be
auto-loaded (with `Bundle.require`[1]). This app uses sinatra, which
doesn't autoload gems, so this statement does nothing.

[1]
https://github.com/alphagov/collections-publisher/blob/61407d445723a5de7
38f22a6120d40aa87e44a1c/config/application.rb#L13

alphagov/rummager,alphagov/rummager