[ALSA] vxpocket - Remove unused code

Digigram VX Pocket driver
Removed unused files (dropped by the last change).
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pcmcia/vx/vxp440.c

-#define COMPILE_VXP440
-
-/*
- add the following as /etc/pcmcia/vxp440.conf:
-
-  device "snd-vxp440"
-    class "audio" module "snd-vxp440"
-
-  card "Digigram VX-POCKET440"
-    manfid 0x01f1, 0x0100
-    bind "snd-vxp440"
-*/
-
-#include "vxpocket.c"