staging: r8188eu: Remove empty header file

File include/drv_types_linux.h is empty. Remove it.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210729170930.23171-2-Larry.Finger@lwfinger.net


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