winecoreaudio.drv: Remove unused WINE_DEFAULT_DEBUG_CHANNEL

[Andrew Talbot]

Changelog:
    winecoreaudio.drv: Remove unused WINE_DEFAULT_DEBUG_CHANNEL.

diff -urN a/dlls/winecoreaudio.drv/audiounit.c b/dlls/winecoreaudio.drv/audiounit.c
--- a/dlls/winecoreaudio.drv/audiounit.c	2007-01-10 21:49:00.000000000 +0000
+++ b/dlls/winecoreaudio.drv/audiounit.c	2007-02-02 12:28:44.000000000 +0000
@@ -21,8 +21,6 @@
 #include "config.h"
 #include "wine/debug.h"
 
-WINE_DEFAULT_DEBUG_CHANNEL(wave);
-
 #ifdef HAVE_AUDIOUNIT_AUDIOUNIT_H
 #include <AudioUnit/AudioUnit.h>