remove the outlook mailbox of an office 365 group

So i believe the current functionality is such that if you create an office 365 group by creating a team in teams then the group will not be visible in outlook.  No mailbox, calendar, etc.  I would like to see if there is a way to do this with an older group which appears in teams and outlook, we do not need the outlook features of the group (mailbox/etc.)  the group pretty much live in Teams and SharePoint.  the general feeling is that it is a little confusing to users to see the group everywhere, as far as where to participate in the conversation.  just seems like unneeded bloat to list them all in outlook.

Anyway, the question is is there a way to remove the group from outlook but keep it for Teams/Sharepoint/Planner/etc.?