code: public JenkinsServer deleteJob(FolderJob folder, String jobName, boolean crumbFlag) throws IOException {
          client.post(UrlUtils.toJobBaseUrl(folder, jobName) + "/doDelete", crumbFlag);
          return this;
      }
docs: Delete a job from Jenkins within a folder.
  
  @param folder The folder where the given job is located.
  @param jobName The job which should be deleted.
  @param crumbFlag The crumbFlag
  @throws IOException in case of problems.