Remove an unavailable gem minitest-osx

[ohtake]

'minitest-osx' gem has been removed from RubyGems.

https://rubygems.org/gems/minitest-osx

This gem previously existed, but has been removed by its owner.

Console output:

Step 16/19 : RUN bundle install --without production replica
 ---> Running in 651952df1e09
Don't run Bundler as root. Bundler can ask for sudo if it is needed, and
installing your bundle as root will break this application for all non-root
users on this machine.
Fetching gem metadata from https://rubygems.org/.............
Could not find minitest-osx-0.1.0 in any of the sources
ERROR: Service 'api' failed to build: The command '/bin/sh -c bundle install --without production replica' returned a non-zero code: 7

[macite]

Can we keep that but make it platform dependent?

There is an example of this here:
https://developers.supportbee.com/blog/using-platform-dependent-gems-rb-inotify-and-rb-fsevent/

[ohtake]

The issue is not related to platforms.
The gem has been removed.
It is impossible to build the app on macOS too.

[macite]

That is a new... thanks for the fix!