[website] Remove mips project

[carlavilla]

Summary

Since we have this[1] and this[2] I think we can remove the mips from projects folder.

[1] https://www.freebsd.org/platforms/mips.html
[2] https://wiki.freebsd.org/action/show/mips?action=show&redirect=FreeBSD%2Fmips

Test Plan

Compile the website

[bcr]

I think that's a valid reason and I'm OK with the change. Thank you, Sergio.