staging: r8188eu: Remove wrapper routine rtw_msleep_os()

The effect of this macro is to call msleep(). Remove the wrapper.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210805192644.15978-2-Larry.Finger@lwfinger.net


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