Do not create BLS and Limine entries for fallback initramfs

[Mintsuki]

Fallback initramfs seem to no longer be built by default.

[Mintsuki]

This PR is ready for review.

[svartkanin]

Would you have any reference to this claim, the wiki still lists fallback as an entry example https://wiki.archlinux.org/title/Systemd-boot#Adding_loaders

[svartkanin]

This is relevant for issue #3945

This is due to mkinitcpio change and a workaround is mentioned on the wiki here https://wiki.archlinux.org/title/Mkinitcpio#Fallback_initramfs_generation

Change PRESETS=('default') line to PRESETS=('default' 'fallback') in the respective .preset files in /etc/mkinitcpio.d/.

[Mintsuki]

Yeah, but it is disabled by default, so I reckon we should probably not create the entry? That is unless we decide to reenable it.

[svartkanin]

Yeah that makes sense, going against defaults isn't wise...

Can you remove the loop completely in that case as it's not needed. You can remove the variant from the template as that would get replaced with '' anyways

[Mintsuki]

Should be good to go :)