irda: remove CVS keywords

This patch removes CVS keyword that weren't updated for a long time.

One of them was printed as part of a printk, which also doesn't make
much sense for a 5 year old and no longer updated keyword.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>