ruby: remove spurious db build dependency
The dbm module uses gdbm by default which is also a build dependency.
(From OE-Core rev:
79121ff54420e5cc331552ca5620aed81a36aac9)
(From OE-Core rev:
20d9821e9131c3d715ed629ad38eed802f737056)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
