The bsddb module was removed in Python 3 and the dbm module doesn't support
Berkeley DB as an option, so this build dependency can be removed.
(From OE-Core rev: f16eac28d909bc6570d3587a2f4ac26ae0dc6048)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>