Clean up AGAST.
Clean up AGAST.

iabdalkader/openmv,iabdalkader/openmv,kwagyeman/openmv,openmv/openmv,iabdalkader/openmv,openmv/openmv,iabdalkader/openmv,kwagyeman/openmv,kwagyeman/openmv,kwagyeman/openmv,openmv/openmv,openmv/openmv