staging: r8188eu: Remove header file include/rtw_version.h

This file contains only the definition of the driver version. This statement
is moved into a header called by all the affected source files, and the now
empty header is deleted.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210729170930.23171-6-Larry.Finger@lwfinger.net


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