Remove old unused branches

[christoph-zededa]

There are more than 15 branches here: https://github.com/lf-edge/eve-kernel/branches/all

but not all of them are used according to https://github.com/lf-edge/eve/blob/master/kernel-commits.mk ?

[rene]

The main issue on removing old branches is that old EVE versions still rely on the kernel from these branches and this will make us lost traceability. I see some approaches we could follow:

1. "Archive" (some how) these branches. We could create another project, for instance, eve-kernel-archive, to only archive old branches, keeping the eve-kernel nice and clean.
2. Generate kernel source code releases for kernel, as we do for eve-os. Releases could be all the relevant tarballs (kernel, modules, headers) + source code.

IMO (ideally) we should follow both approaches....

@eriknordmark , @rucoder

[christoph-zededa]

@rene sounds good - there are also two branches not starting with eve-kernel-