Remove logger

[aquarhead]

Summary of changes

It seems Logger is not used at all, and my release works fine without it as well. I also posted a question on Elixir Forum and would love some feedback on this.

Licensing/Copyright

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[bitwalker]

Thanks! Distillery used to use Logger, but due to issues with output being dropped when errors occur, I shifted to my own logging module, just never removed the application.