Purging a member from your Community automatically removes their access to the hub.
Remove a Community member from the hub:
Purged members are
removed from the hub when the Community data is synched at 10PM EST.
Warning: Purging a member from the Community does not
remove any posts or comments a member may have contributed to the hub. To
overwrite a member's personal information, request to have the Sensitive Data
feature enabled. For more information, see
Sensitive data.