machine: remove unused machine include file for RaspberryPi
machine: remove unused machine include file for RaspberryPi

tune-arm1176jzf-s.inc is only required by the obsoleted machine
config for RaspberryPi in the old branch (morty).
No longer required in the current branch (warrior).

Signed-off-by: Kazuhiro Hayashi <d6ab13038406a238a56011921c4eda80a48396fd@toshiba.co.jp>

meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian,meta-debian/meta-debian