staging: r8188eu: remove unnecessary rtw_get_passing_time_ms call

Remove the rtw_get_passing_time_ms call in send_beacon.

Calling rtw_get_passing_time_ms makes no sense if we discard the result.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220409163212.241122-3-martin@kaiser.cx


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