[gnome-control-center] sound: Remove unused enumeration

[Bastien Nocera <hadess src gnome org>]

commit 2e18538cc85c055d86c5e1899a1cde6447d10efd
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Apr 1 12:45:56 2015 +0200

    sound: Remove unused enumeration
    
    Left-over from when we had a separate hardware tab.

 panels/sound/gvc-mixer-dialog.c |   11 -----------
 1 files changed, 0 insertions(+), 11 deletions(-)
---
diff --git a/panels/sound/gvc-mixer-dialog.c b/panels/sound/gvc-mixer-dialog.c
index de70367..a358f03 100644
--- a/panels/sound/gvc-mixer-dialog.c
+++ b/panels/sound/gvc-mixer-dialog.c
@@ -91,17 +91,6 @@ enum {
         NUM_COLUMNS
 };
 
-enum {
-        HW_ID_COLUMN,
-        HW_ICON_COLUMN,
-        HW_NAME_COLUMN,
-        HW_STATUS_COLUMN,
-        HW_PROFILE_COLUMN,
-        HW_PROFILE_HUMAN_COLUMN,
-        HW_SENSITIVE_COLUMN,
-        HW_NUM_COLUMNS
-};
-
 enum
 {
         PROP_0,