ALSA: hda - Remove leftover snd_hda_bus() prototype

It was forgotten to be removed.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.h

@@ -298,10 +298,6 @@ struct hda_codec {
 /*
  * constructors
  */
-int snd_hda_bus_new(struct snd_card *card,
-		    const struct hdac_bus_ops *ops,
-		    const struct hdac_io_ops *io_ops,
-		    struct hda_bus **busp);
 int snd_hda_codec_new(struct hda_bus *bus, struct snd_card *card,
 		      unsigned int codec_addr, struct hda_codec **codecp);
 int snd_hda_codec_configure(struct hda_codec *codec);