remove AF obsolete warning for ltd.evilcorp.atox

metadata/ltd.evilcorp.atox.yml

-AntiFeatures:
-  - NonFreeNet
 Categories:
   - Internet
 License: GPL-3.0-or-later

[Michael Pöhn]

I actually meant to open a merge request, sorry. So for documentation: I removed this AF warning because with v0.6.0 aTox introduces an option to manually configure bootstrap nodes.

[Licaon_Kter]

Great, so remove top AF, add per build AF for those versions that had this.