staging: rtl8723bs: remove unused macro in include/rtw_pwrctrl.h

remove unused macro reading field ips_mode_req of struct
pwrctrl_priv

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/39805614be82f1fd90ee460ffedb8a7beb99dce9.1616854134.git.fabioaiuto83@gmail.com


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