Delete activity of my forum

[kh99]

I'm not sure what you mean - do you want to remove the existing activity, or do you want to shut off the feature entirely? If you want to delete the old activity, you could go to Settings > Options > Activity Stream and set the Expiration to something small, then go to Maintenance > General Update Tools and run Rebuild Activity Stream (at the bottom). But of course if you want it to save 30 days worth you'll have to increase it at some point.

If you want to trun off the feature entirely, to be honest I don't know if there's a way to do that (although you can always just remove the tab).