[PATCH -next] ALSA: es1688: Remove set but not used variable 'hw'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

sound/isa/es1688/es1688_lib.c: In function 'snd_es1688_probe':
sound/isa/es1688/es1688_lib.c:124:31: warning:
 variable 'hw' set but not used [-Wunused-but-set-variable]
  unsigned short major, minor, hw;
                               ^

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 sound/isa/es1688/es1688_lib.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/sound/isa/es1688/es1688_lib.c b/sound/isa/es1688/es1688_lib.c
index da341969e650..1d9556c045e9 100644
--- a/sound/isa/es1688/es1688_lib.c
+++ b/sound/isa/es1688/es1688_lib.c
@@ -121,7 +121,7 @@ EXPORT_SYMBOL(snd_es1688_reset);
 static int snd_es1688_probe(struct snd_es1688 *chip)
 {
        unsigned long flags;
-       unsigned short major, minor, hw;
+       unsigned short major, minor;
        int i;
 
        /*
@@ -166,14 +166,12 @@ static int snd_es1688_probe(struct snd_es1688 *chip)
        if (!chip->version)
                return -ENODEV; /* probably SB */
 
-       hw = ES1688_HW_AUTO;
        switch (chip->version & 0xfff0) {
        case 0x4880:
                snd_printk(KERN_ERR "[0x%lx] ESS: AudioDrive ES488 detected, "
                           "but driver is in another place\n", chip->port);
                return -ENODEV;
        case 0x6880:
-               hw = (chip->version & 0x0f) >= 8 ? ES1688_HW_1688 : 
ES1688_HW_688;
                break;
        default:
                snd_printk(KERN_ERR "[0x%lx] ESS: unknown AudioDrive chip "