staging: r8188eu: Remove 4 empty routines from os_sep/service.c

Routines rtw_suspend_lock_init(), rtw_suspend_lock_uninit(),
rtw_lock_suspend(), and rtw_unlock_suspend() do not conti=ain any code.
Simplify by removing them.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210802192721.23110-5-Larry.Finger@lwfinger.net


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