ALSA: emu10k1: remove obsolete card type variable and defines

The use of the variable was removed in commit 2b637da5 ("clean up
card features"). That commit also broke user space (the ioctl
structure), at which point the defines became meaningless, so I don't
think purging them is a problem.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230421141006.1005452-3-oswald.buddenhagen@gmx.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/emu10k1.h

@@ -1689,7 +1689,6 @@ struct snd_emu10k1 {
 	unsigned int revision;			/* chip revision */
 	unsigned int serial;			/* serial number */
 	unsigned short model;			/* subsystem id */
-	unsigned int card_type;			/* EMU10K1_CARD_* */
 	unsigned int ecard_ctrl;		/* ecard control bits */
 	unsigned int address_mode;		/* address mode */
 	unsigned long dma_mask;			/* PCI DMA mask */

include/uapi/sound/emu10k1.h

@@ -15,9 +15,6 @@
  * ---- FX8010 ----
  */
 
-#define EMU10K1_CARD_CREATIVE			0x00000000
-#define EMU10K1_CARD_EMUAPS			0x00000001
-
 #define EMU10K1_FX8010_PCM_COUNT		8
 
 /*