Staging: Comedi: drivers: Remove comment copied from skel.c

The dmm32at.c and comedi_bond.c comedi driver files contain an
instructional comment block copied over from skel.c about how to format
a driver comment block.  This comment was modified in skel.c by a
previous patch in this series to stop Comedi's 'dump_doc' script
treating it as an actual driver comment block.  There isn't any need to
repeat this comment block in the other source files, so rather than
modify it, this patch just removes it from those files.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>