Remove initramfs-tools config
This is a bit of a guess. I am not 100% sure if this has any impact. But I haven't
found any way to make it an independent config file (i.e. it doesn't overwrite a
default one), and it won't work on Arch or any non-debian distro anyways.
Signed-off-by: Dorian Stoll <dorian.stoll@tmsp.io>