d3drm: Remove unused Wine debug channel

[Andrew Talbot]

Changelog:
    d3drm: Remove unused Wine debug channel.

diff --git a/dlls/d3drm/math.c b/dlls/d3drm/math.c
index 76b73c0..ff416b6 100644
--- a/dlls/d3drm/math.c
+++ b/dlls/d3drm/math.c
@@ -30,10 +30,6 @@
 #include "wingdi.h"
 #include "d3drmdef.h"
 
-#include "wine/debug.h"
-
-WINE_DEFAULT_DEBUG_CHANNEL(d3drm);
-
 /* Create a RGB color from its components */
 D3DCOLOR WINAPI D3DRMCreateColorRGB(D3DVALUE red, D3DVALUE green, D3DVALUE blue)
 {