Remove the packaging files

The idea of these was to provide packages via packagecloud.io and use their
service as a way to provide up to date packages for end users. However, things
have changed since that decision and it has become very clear that using Flatpak
solves all of the issues the repositories on package cloud were supposed to but
with a much lower effort.

Testing Done:
Compiled

Reviewed at https://reviews.imfreedom.org/r/1780/