virtchnl: remove unused structure declaration

Nothing uses virtchnl_msg, just remove it.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Marek Szlosek <marek.szlosek@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

include/linux/avf/virtchnl.h

@@ -162,19 +162,6 @@ enum virtchnl_ops {
 #define VIRTCHNL_CHECK_UNION_LEN(n, X) enum virtchnl_static_asset_enum_##X \
 	{ virtchnl_static_assert_##X = (n)/((sizeof(union X) == (n)) ? 1 : 0) }
 
-/* Virtual channel message descriptor. This overlays the admin queue
- * descriptor. All other data is passed in external buffers.
- */
-
-struct virtchnl_msg {
-	u8 pad[8];			 /* AQ flags/opcode/len/retval fields */
-	enum virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
-	enum virtchnl_status_code v_retval;  /* ditto for desc->retval */
-	u32 vfid;			 /* used by PF when sending to VF */
-};
-
-VIRTCHNL_CHECK_STRUCT_LEN(20, virtchnl_msg);
-
 /* Message descriptions and data structures. */
 
 /* VIRTCHNL_OP_VERSION