ALSA: i2c: Drop commented old debug prints

There are quite a few commented-out debug prints that have never been
used in the production code.  Let's rip them off for code cleanness.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20240807133452.9424-18-tiwai@suse.de