Suppress 'Start Free Trial' message

Is there a configuration flag to suppress the ‘Start your Free Trial’ pop-ups that seem to be prevalent in v6.0+?

Make sure you are using Mattermost Team Edition not Mattermost Enterprise Edition.

I deployed the self-hosted Mattermost server in 2018 using version 5.X, then upgraded to v6. Now I’m running 6.3.3 and it says it’s the Enterprise Edition. How do I switch it to Team Edition?