I dnf system-upgraded my Fedora 24 laptop to 25, and I see this file in /boot:
-rw-r--r--. 1 root root 559315 May 11 2016 initrd-plymouth.img
date stamped May 11 2016 which seems old since I've updated and have all these kernels, the newest 4.10.3-200 was built 15 March 2017
and the initrd-plymouth.img belongs to no rpm file:
rpm -qf /boot/initrd-plymouth.img
file /boot/initrd-plymouth.img is not owned by any package
so is this file obsolete and can be deleted or does some other package generate that which explains having no package?