Command delete-builds

java -jar jenkins-cli.jar -s http://192.168.0.70:8899/jenkins/ -webSocket delete-builds JOB RANGE

Delete build records of a specified job, possibly in a bulk. 

 JOB   : Name of the job to build
 RANGE : Range of the build records to delete. 'N-M', 'N,M', or 'N'