Removing core-publishing module from settings.gradle
Removing core-publishing module from settings.gradle

The `core-publishing` module is no present in the Nakadi codebase now.
The `core-publishing` entry in the settings.gradle is simply creating
empty directory that is not committed to the repo and generating an
empty Jar file as well. Removing this entry to cleanup the
`settings.gradle`.

zalando/nakadi,zalando/nakadi