Remove several init scripts for operating systems that are no longer
supported:
* `init.ubuntu` would only be useful on Ubuntu 14.04 LTS which has been
in ESM for over a year
* `init.solaris` is for an operating system that hasn't been updated in
>10 years
* `init.upstart` is for a startup method Ubuntu attempted but abandoned
* `init.fedora.centos.service` is for a version that hasn't recieved
updates since 2017-05-10
* `init.freenas` is identical to `init.freebsd`
* `init-alt.freebsd` appears to attempt to use the web interface
directly, and would break with authentication enabled
Now that the Tautulli will run on both major versions of Python we can
remove the specificity in the init scripts and make them simpler, with
the added advantage that some OS's will now run Tautulli through Python
3 instead of Python 2.
