MAINT: Delete classy function

[Lucia-Fonseca]

Description

Delete extra classy function, any associated unit tests and references. Merging this PR closes #558 .

Checklist

• [x] Follow the Contributor Guidelines
• [ ] Write unit tests
• [ ] Write documentation strings
• [ ] Assign someone from your working team to review this pull request
• [ ] Assign someone from the infrastructure team to review this pull request

[Lucia-Fonseca]

~Still needs to delete the unit test associated~