update/release: delete multi-tree upstream repos

e.g. src/coreboot/coreboot must not appear in a release,
because we instead have directories like
src/coreboot/default or src/coreboot/cros

lbmk resets src/coreboot/coreboot to HEAD, but then resets
revisions properly in copies of it

therefore, for reproducibility, we must not include
src/coreboot/coreboot, src/u-boot/u-boot or
src/seabios/seabios into libreboot releases

Signed-off-by: Leah Rowe <leah@libreboot.org>

0 files changed, 0 insertions, 0 deletions