remove legacy models

...ontrollers/admin/education/program/teachers_controller.rb

...llers/admin/education/school/administrators_controller.rb

app/controllers/admin/education/teachers_controller.rb

app/models/ability.rb

app/models/education/program/teacher.rb

app/models/education/school.rb

app/models/education/school/administrator.rb

app/models/university/person.rb

app/models/university/person/with_education.rb

app/views/admin/education/program/teachers/_form.html.erb

app/views/admin/education/program/teachers/_list.html.erb

app/views/admin/education/program/teachers/edit.html.erb

app/views/admin/education/program/teachers/index.html.erb

app/views/admin/education/program/teachers/new.html.erb

...iews/admin/education/school/administrators/_form.html.erb

...iews/admin/education/school/administrators/_list.html.erb

...views/admin/education/school/administrators/edit.html.erb

app/views/admin/education/school/administrators/new.html.erb

config/locales/education/en.yml

config/locales/education/fr.yml