Delete unused header file linux/awe_voice.h

Delete the unused header file include/linux/awe_voice.h, as well as
its corresponding Kbuild entry.
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/Kbuild

@@ -33,7 +33,6 @@ header-y += atmsvc.h
 header-y += atm_zatm.h
 header-y += auto_fs4.h
 header-y += auxvec.h
-header-y += awe_voice.h
 header-y += ax25.h
 header-y += b1lli.h
 header-y += baycom.h