How to delete debug logs from salesforce?

You cannot delete the debug logs natively in Apex code. But you can use Rest DELETE endpoint to delete debug logs salesforce.

I have created a utility code to delete debug logs that way, you can refer to it.

The only limitation is

It can delete only 100 in 1 iteration(You can use a composite API to it).

It creates a new debug log after execution

   List  loglist = [Select Id from Apexlog limit 100]; for(Apexlog al: loglist){ Http h = new Http(); HttpRequest req = new HttpRequest(); req.setEndpoint(Url.getOrgDomainUrl().toExternalForm() + '/services/data/v44.0/sobjects/Apexlog/'+al.Id); req.setMethod('DELETE'); req.setHeader('Authorization', 'Bearer ' + UserInfo.getSessionId()); HttpResponse res = h.send(req); System.debug(res.getStatusCode()); }

If you are calling this method from the lightning component, your Session ID won't be api enabled. Thus you have to use named credentials.
src: https://salesforce.stackexchange.com/a/239642/19118