How to opt-out of SharePoint content type hub

2 years ago, I set up provisioning of new sites with site design and it works fine. Lately my implementation of PnP PowerShell

Invoke-PnPSiteDesign -Identity $siteDesign -WebUrl $preURL+$project -Connection $projConn

has conflict with the content type in the {tenant}.sharepoint.com/sites/contentTypeHub

How can I stop the usage of the content type gallery ?

Thanks