[website] Update projects section

[carlavilla]

Summary

Remove busdma and netpert projects from the website.

These two projects have a very very stale information.

Test Plan

Compile the website

[bcr]

I'm OK with the change itself. Just want to make sure than @imp is fine with the content removal (it's available in the repo if someone needs it).

[imp]

While there's continuing improvements here from time to time, the bulk of this work is done.