[ALSA] Clean up duplicate includes in sound/core/

This patch cleans up duplicate includes in
	sound/core/
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/core/rawmidi.c

@@ -30,7 +30,6 @@
 #include <linux/mutex.h>
 #include <linux/moduleparam.h>
 #include <linux/delay.h>
-#include <linux/wait.h>
 #include <sound/rawmidi.h>
 #include <sound/info.h>
 #include <sound/control.h>