staging: r8188eu: remove unused variable from rtl8188e_init_dm_priv

Remove unused variable from the rtl8188e_init_dm_priv function in
hal/rtl8188e_dm.c

Acked-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210810235047.177883-6-phil@philpotter.co.uk


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