[hail] Remove unused Extract object. (#7696)
[hail] Remove unused Extract object. (#7696)

* [hail] Remove unused Extract object.

* bump!

* bump!

danking/hail,hail-is/hail,cseed/hail,cseed/hail,hail-is/hail,hail-is/hail,hail-is/hail,danking/hail,danking/hail,hail-is/hail,hail-is/hail,danking/hail,danking/hail,danking/hail,cseed/hail,danking/hail,danking/hail,cseed/hail,cseed/hail,hail-is/hail,hail-is/hail,cseed/hail,cseed/hail,cseed/hail