[vdi] Refactor texture/surface reference support.

Change-Id: I8014d82aae7139ef5f95e4b50c4fc6da200dbc9d

include/hip/hcc_detail/host_defines.h

@@ -72,7 +72,6 @@ THE SOFTWARE.
 
 #define __noinline__ __attribute__((noinline))
 #define __forceinline__ inline __attribute__((always_inline))
-#define __hip_pinned_shadow__ __attribute__((hip_pinned_shadow))
 
 #else