Revert "Patch app/controllers/omniauth_callbacks_controller.rb for omniauth_crowd support"

This reverts commit 866227b312e404888016a9957857e4c8d9e69798.
Revert "Patch initializers/devise.rb with omniauth_crowd support"

This reverts commit 50c37309ff045e9a7bc1b02bd9f401a74c03a9c8.