Delete debug trace logs

SELECT Id, CreatedDate, CreatedById, ExpirationDate, TracedEntityId, ApexCode, ApexProfiling, 
Callout, Database, System, Validation, Visualforce, Workflow FROM TraceFlag

https://help.salesforce.com/articleView?id=000231445&type=1

Delete debug log, trace log

SELECT Id, StartTime, LogUserId, LogLength, Location FROM ApexLog

https://help.salesforce.com/articleView?id=code_debug_log_delete.htm&type=5