Forgot to delete routine's 'edit' view
Cleanup Workouts

Remove unnecessary actions and templates, remove comments, adjust tests
for nested resource
Cleanup Exercises

Remove unnecessary actions and comments and views, adjust tests for
nested resource
Cleanup Lifts

Remove unnecessary actions, comments, and views. Adjust tests for
nested resource.
Cleanup Routines some more

Remove edit paths. Remove unnecessary redirects. Fix private method
indentation in controller.