drm/amd/display: Remove duplicate define of TO_DCN20_HUBBUB

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Acked-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubbub.h

@@ -29,9 +29,6 @@
 #include "dcn10/dcn10_hubbub.h"
 #include "dcn20_vmid.h"
 
-#define TO_DCN20_HUBBUB(hubbub)\
-	container_of(hubbub, struct dcn20_hubbub, base)
-
 #define TO_DCN20_HUBBUB(hubbub)\
 	container_of(hubbub, struct dcn20_hubbub, base)