copied from : https://gist.github.com/nextrevision/d11b2df4e8b229c6855b#file-deletejenkinsjobs-groovy

deleteJenkinsJobs.groovy

import jenkins.model.*

def matchedJobs = Jenkins.instance.items.findAll { job ->
    job.name =~ /my_regex_here/
}
    
matchedJobs.each { job ->
    println job.name
    //job.delete()
}