ALSA: wss_lib: remove second mutexes initialization

Remove initializations of spinlock and mutexes which
are done earlier in snd_wss_new(). The snd_wss_new()
is called from snd_wss_create().

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>