staging: r8188eu: remove DbgPrint and RT_PRINTK macro definitions

Remove DbgPrint and RT_PRINTK macro definitions from include/odm_debug.h,
as they are called from nowhere and are therefore superfluous. Also
remove comment in core/rtw_xmit.c referring to DbgPrint so that future
confusion is prevented.

Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210731003937.68615-14-phil@philpotter.co.uk


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