Removed some more unnecessary firmware packages

[ghost]

I've used package-cleanup --leaves --all and repoquery -l to identify some more unused firmware packages.

If size matters, the following packages could be deleted as well. It depends on your definition of „JeOS“.
I prefer to remove as much as possible and provision the base box with Chef afterwards.
On the one hand this approach leads to a least common multiple for all operating systems - on the other hand it requires provisioning real low-level stuff.

-parted
-postfix
-NetworkManager-tui
-firewalld
-btrfs-progs
-microcode_ctl
-tuned
-selinux-policy-targeted
-rsyslog
-lvm2

[juliandunn]

I'm ok with removing the packages you mentioned. The only one we need to check is selinux-policy-targeted because I'd like to keep building the boxes with SELinux enabled but in Permissive mode. As long as it doesn't blow that out of the water, we can remove the Targeted policy.

[ghost]

I'll test the impact on typical use cases when removing those packages and open another pull request as soon as it's done.

[juliandunn]

Excellent; I'll merge this for now.