Remove nfriend

@nfriend is no longer interim front end manager for the Package Group. @dcroft is the interim front end manager so I'm removing Nathan.

/cc @jhampton @erushton @darbyfrey

Consider adding documentation to the handbook pages for Triage Operations when creating a new triage policy or triage package:

• https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/source/handbook/engineering/quality/triage-operations/index.html.md