(responding to sixpack13)
there are errors mostly regarding ACPI, but it doesn't seems to me that the box has difficulties to run.
Agreed. I used to see those (or something similar) every time I booted. I haven't seen such messages in a while now.
as I thought kmod-nvidia-5.0.7-200 belongs to your running kernel. I guess it's in your remove list cause it was installed by hand and NOT via dnf from rpmfusion. at the rpmfusion website is a howto how to install nvidia modules. https://rpmfusion.org/Howto/NVIDIA?highlight=%28CategoryHowto%29
It took a lot of brute-force digging through the 2013 postings in this list. HyperKitty does not make this easy; it doesn't list my postings before 2014. kmod-nvidia... was installed in September 2013 following the process given here: "https://www.if-not-true-then-false.com/2013/fedora-18-nvidia-guide/", as suggested by Rick Stevens in my thread "problem: system freezes.". So I manually ran yum (dnf's predecessor) to install kmod-nvidia... from the RPMFusion repositories.
Shortly after posting the initial message of this thread, I realized part of my question was unneeded. The "--exclude=kernel,kernel-*" part of the recommended command answers my question about all the kernel... items in the "dnf list extras" list.
I believe I now have all the info I need on this thread's topic. I'm marking the thread [SOLVED]. Thank-you for your help.