Remove community access tag when onboarding tag removed

Members kept onboarding access after the marketing tag was removed, causing confusing messages and stale group access. Remove the community tag so managers see updated membership within minutes.

Overview

Marketing tags and community memberships often fall out of sync, so members keep getting onboarding content they no longer need. This flow removes community tags automatically when onboarding tags change, giving community managers accurate rosters and stopping irrelevant messaging within minutes.