Drop --all-ramdisk-modules from genkernel parameters

[warmstart]

Hi,

I am not sure if this doesn't break anything else, but I needed to remove "--all-ramdisk-modules" from the genkernel parameters, or else, I would run into an issue via cpio.

See here for reference: https://forums.gentoo.org/viewtopic-t-1068036-start-0.html

Thanks, sege