uninative-tarball: delete the packagedata task

uninative-tarball: delete the packagedata task

This task is meaningless for uninative-tarball as the package task
has been deleted. Besides, sometimes it would cause problems. To
reproduce, use the following command.

bitbake uninative-tarball -c cleansstate && bitbake uninative-tarball &&
bitbake uninative-tarball -c clean && bitbake uninative-tarball

The error is something like below.

File: 'sstate.bbclass', lineno: 33, function: sstate_installpkg
     0029:        bb.build.exec_func(f, d)
     0030:
     0031:    for state in ss['dirs']:
     0032:        prepdir(state[1])
 *** 0033:        os.rename(sstateinst + state[0], state[1])
     0034:    sstate_install(ss, d)
     0035:
     0036:    for plain in ss['plaindirs']:
     0037:        workdir = d.getVar('WORKDIR', True)
Exception: OSError: [Errno 2] No such file or directory

[YOCTO #7597]

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>