Update a couple of commands for cleanup.
    
    Fedora doesn't seem to use "initrd" anymore, so show removing "initramfs" instead.
    
    Fedora uses the Boot Loader Specification[0] for defining boot entries,
    the grub config should rarely need to be edited by hand. Show removing
    the drop in entries made by installing the custom kernel, and rebuilding
    the grub config.
    
    [0] - https://systemd.io/BOOT_LOADER_SPECIFICATION/