Remove duplicated logging initialization

What does this MR do?

The logging was being configured in two different places, in the runApp() and in the appMain(). I might be wrong, but I think we can keep only the first instance of this configuration.

TODO

• I added the Changelog trailer (e.g. Changelog: added) to the commits that need to be included in the changelog
• I added unit tests or they are not required
• I added acceptance tests or they are not required
• I added documentation (or it's not required)
• I followed code review guidelines
• I followed Go Style guidelines