feat(lib): Remove fonts from the repository

[louismaximepiton]

Note: Please transform - [ ] into - (NA) in the description when things are not applicable

Related issues

Linked to #3224.

Description

Remove Helvetica fonts from the repository.

Motivation & Context

TODO

Types of change

• Breaking change (fix or feature that would change existing functionality)

Live previews

• https://deploy-preview-3230--boosted.netlify.app/

Checklist

Contribution

• [x] I have read the contributing guidelines

Accessibility

• [x] My change follows accessibility good practices; I have at least run axe

Design

• [x] My change respects the design guidelines defined in Orange Design System
• [x] My change is compatible with a responsive display

Development

• [x] My change follows the developer guide
• [x] I have added JavaScript unit tests to cover my changes
• [x] I have added SCSS unit tests to cover my changes

Documentation

• [ ] My change introduces changes to the documentation and/or I have updated the documentation accordingly

Checklist (for Core Team only)

• [ ] My change introduces changes to the migration guide
• [ ] My new component is well displayed in Storybook
• [ ] My new component is compatible with RTL
• [ ] Manually run BrowserStack tests
• [ ] Manually test browser compatibility with BrowserStack (Chrome >= 60, Firefox >= 60 (+ ESR), Edge, Safari >= 12, iOS Safari, Chrome & Firefox on Android)
• [ ] Code review
• [ ] Design review
• [ ] A11y review

After the merge

• [ ] Manually launch Percy tests

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