removes rails generate command from README since that's not needed
removes rails generate command from README since that's not needed

ndlib/scholarsphere,samvera/hyrax,ndlib/scholarsphere,ndlib/scholarsphere,zhang4952/scholarsphere,zhang4952/scholarsphere,samvera/hyrax,samvera/hyrax,jeremyf/sufia,zhang4952/scholarsphere,jeremyf/sufia,zhang4952/scholarsphere,samvera/hyrax