sign-efi.bbclass: Do not deploy the unused .signed symlink
sign-efi.bbclass: Do not deploy the unused .signed symlink

do_deploy:append replaces the original file with its signed counterpart,
the signature just gets ignored for non secure boot setups. The .signed
symlink was in place for backwards compatibility but nothing is using it
anymore therefore we can safely remove it.

Change-type: patch
Signed-off-by: Michal Toman <150b8621a675a5d55b9991692bfca28a89cfbab1@balena.io>
resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin