Currently the dnf command inside SDK does not work. We will
get error message like below:
ImportError: No module named 'dnf'
So remove it from nativesdk-packagegroup-sdk-host, otherwise,
users will get unpleasant experience if they are working inside
SDK environment on some distros like Fedora.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
