V4L/DVB (4884): Remove stray IR code left from patchset

This caused compilation to fail - completely replaced by new style
functions, so can be removed.

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>