[ALSA] Remove unused yss225.h

Wavefront drivers
yss225.h is just obsolete, not used/read by any codes.
Let's remove it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/yss225.h

-#ifndef __SOUND_YSS225_H
-#define __SOUND_YSS225_H
-
-extern unsigned char page_zero[256];
-extern unsigned char page_one[256];
-extern unsigned char page_two[128];
-extern unsigned char page_three[128];
-extern unsigned char page_four[128];
-extern unsigned char page_six[192];
-extern unsigned char page_seven[256];
-extern unsigned char page_zero_v2[96];
-extern unsigned char page_one_v2[96];
-extern unsigned char page_two_v2[48];
-extern unsigned char page_three_v2[48];
-extern unsigned char page_four_v2[48];
-extern unsigned char page_seven_v2[96];
-extern unsigned char mod_v2[304];
-extern unsigned char coefficients[364];
-extern unsigned char coefficients2[56];
-extern unsigned char coefficients3[404];
-
-
-#endif /* __SOUND_YSS225_H  */