Remove the obsolete TaskStatus message

nav2_msgs/CMakeLists.txt

@@ -16,7 +16,6 @@ rosidl_generate_interfaces(${PROJECT_NAME}
   "msg/CostmapMetaData.msg"
   "msg/MissionPlan.msg"
   "msg/Path.msg"
-  "msg/TaskStatus.msg"
   "msg/VoxelGrid.msg"
   "srv/GetCostmap.srv"
   "srv/ClearCostmapExceptRegion.srv"

nav2_msgs/msg/TaskStatus.msg

-uint8 SUCCEEDED=0
-uint8 FAILED=1
-uint8 RUNNING=2
-uint8 CANCELED=3
-uint8 result
\ No newline at end of file