staging: rtl8723bs: remove empty hal/odm_debug.c file

remove file left empty after function deletion.
remove related target in Makefile.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/0bd6ce2da09a5e2a671dc4a53f1c2e7ba1a64066.1619794331.git.fabioaiuto83@gmail.com


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