staging/rtl8192u/ieee80211: remove debugging line

Remove unnecessary debug line from rtl8192u_dot11d_init().

Signed-off-by: Elena Afanasova <eafanasova@gmail.com>
Link: https://lore.kernel.org/r/20201022123545.4530-1-eafanasova@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>