ALSA: hda - Remove unused snd_hda_get_nid_path()

An exported helper function snd_hda_get_nid_path() is nowhere used.
Let's remove it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -278,22 +278,6 @@ static struct nid_path *get_nid_path(struct hda_codec *codec,
 	return NULL;
 }
 
-/**
- * snd_hda_get_nid_path - get the path between the given NIDs
- * @codec: the HDA codec
- * @from_nid: the NID where the path start from
- * @to_nid: the NID where the path ends at
- *
- * Return the found nid_path object or NULL for error.
- * Passing 0 to either @from_nid or @to_nid behaves as a wildcard.
- */
-struct nid_path *snd_hda_get_nid_path(struct hda_codec *codec,
-				      hda_nid_t from_nid, hda_nid_t to_nid)
-{
-	return get_nid_path(codec, from_nid, to_nid, 0);
-}
-EXPORT_SYMBOL_GPL(snd_hda_get_nid_path);
-
 /**
  * snd_hda_get_path_idx - get the index number corresponding to the path
  * instance

sound/pci/hda/hda_generic.h

@@ -306,8 +306,6 @@ int snd_hda_gen_spec_init(struct hda_gen_spec *spec);
 int snd_hda_gen_init(struct hda_codec *codec);
 void snd_hda_gen_free(struct hda_codec *codec);
 
-struct nid_path *snd_hda_get_nid_path(struct hda_codec *codec,
-				      hda_nid_t from_nid, hda_nid_t to_nid);
 int snd_hda_get_path_idx(struct hda_codec *codec, struct nid_path *path);
 struct nid_path *snd_hda_get_path_from_idx(struct hda_codec *codec, int idx);
 bool snd_hda_parse_nid_path(struct hda_codec *codec, hda_nid_t from_nid,