CNCF sites that potentially should be removed from Netlify

[nate-double-u]

Moved from https://github.com/cncf/techdocs/issues/133

CNCF sites that potentially should be removed from Netlify

• [x] https://github.com/cncf/cncf-branding - archived, https://branding.cncf.io/ resolves to github.
• [ ] https://github.com/cncf/sig-security-events/issues/2 - last update on this site was 3 years ago. do we use it still?
• [ ] https://github.com/cncf/foundation-starter-kit/issues/1 - last update on this site was 3 years ago. Do we use it still?
• [ ] parsec-website -- this appears to be linked Celeste's working repo for https://github.com/parallaxsecond/parsec-website.