Cleanup useradd class by removing the code made obsolete by
the introduction of Recipe Specific Sysroot.
(From OE-Core rev: 2c126e704ebb58afc0d79fe220dc370e09d6bfd5)
Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>