Remove duplicated sta_authorized_cb call

Remove duplicated sta_authorized_cb call

Commit 6959145b86318710d0186b618d54bce2991a6e6f ('FST: Integration into
hostapd') introduced this duplicated call due to an incorrect merge
conflict resolution in ap_sta_set_authorized(). An earlier commit
61fc90483fec17b69a26b16e42723474daccec24 ('P2P: Handle improper WPS
termination on GO during group formation') had moved this call to an
earlier location in the function and there is no point in re-introducing
another copy of the call at the end of the function.

Signed-off-by: Jouni Malinen <j@w1.fi>