[Enhancement]: Unused tokeninput.css in persona bar

[valadas]

Is there an existing issue for this?

• [X] I have searched the existing issues

Description of problem

The persona bar has a tokeninput.css that appears to be unused.

Description of solution

We could remove it to improve performance and reduce what we have to maintain.

Description of alternatives considered

We could leave it in place in case 3rd-party extensions may use it.

Anything else?

No response

Do you be plan to contribute code for this enhancement?

• [X] Yes

Would you be interested in sponsoring this enhancement?

• [ ] Yes

Code of Conduct

• [X] I agree to follow this project's Code of Conduct