Copter: move gps inject handling up to GCS_MAVLINK

ArduCopter/GCS_Mavlink.cpp

@@ -1682,11 +1682,6 @@ void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
         handle_serial_control(msg, copter.gps);
         break;
 
-    case MAVLINK_MSG_ID_GPS_INJECT_DATA:
-        handle_gps_inject(msg, copter.gps);
-        result = MAV_RESULT_ACCEPTED;
-        break;
-
 #if PRECISION_LANDING == ENABLED
     case MAVLINK_MSG_ID_LANDING_TARGET:
         result = MAV_RESULT_ACCEPTED;