drm/xe/guc: Drop unused legacy GuC message ABI definitions

Those were copy-pasted from i915 code and never used in Xe driver.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610120411.1768-2-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/abi/guc_messages_abi.h

@@ -220,17 +220,4 @@
 #define GUC_HXG_RESPONSE_MSG_0_DATA0		GUC_HXG_MSG_0_AUX
 #define GUC_HXG_RESPONSE_MSG_n_DATAn		GUC_HXG_MSG_n_PAYLOAD
 
-/* deprecated */
-#define INTEL_GUC_MSG_TYPE_SHIFT	28
-#define INTEL_GUC_MSG_TYPE_MASK		(0xF << INTEL_GUC_MSG_TYPE_SHIFT)
-#define INTEL_GUC_MSG_DATA_SHIFT	16
-#define INTEL_GUC_MSG_DATA_MASK		(0xFFF << INTEL_GUC_MSG_DATA_SHIFT)
-#define INTEL_GUC_MSG_CODE_SHIFT	0
-#define INTEL_GUC_MSG_CODE_MASK		(0xFFFF << INTEL_GUC_MSG_CODE_SHIFT)
-
-enum intel_guc_msg_type {
-	INTEL_GUC_MSG_TYPE_REQUEST = 0x0,
-	INTEL_GUC_MSG_TYPE_RESPONSE = 0xF,
-};
-
 #endif