Remove es6-promise-1e68dc.auto.min.js, see https://github.com/phetsims/tasks/issues/1037
Remove es6-promise-1e68dc.auto.min.js, see https://github.com/phetsims/tasks/issues/1037

phetsims/graphing-quadratics,phetsims/graphing-quadratics,phetsims/graphing-quadratics