Remove AUTHORS file

License of this file doesn't match the license stated in COPYING and in
most source code files (GPLv3 vs AGPLv3). Furthermore, we don't really
maintain this file, so let's drop it to avoid non-up-to-date content
which may introduce confusion.

Related: OS#3515
Change-Id: I536a145cb7696af8e9dbd3065ee5e5f493217ac6
2 files changed