Clear out removed parent/guardian and emergency-contact attributes from Student_form
Remove instances of guardian_x and emergency_x (removed Student attributes) from spec tests
Remove validation for guardian_name (removed)
Remove 'add-table-here' notes
Remove guardian_x and emergency_x attributes from .jbuilders
Remove guardian_x and emergency_x attributes from permitted params
Remove display areas for removed guardian_x/emergency_x attributes
Update to-do list