We recently switched our existing Jenkins server over to configuration-as-code. Prior to the change, we had mailer and email-ext configured in a certain way. The new configuration yaml omits any configuration for those plugins because we no longer wish to configure them.

However, the Jenkins settings page (in the web UI) still shows the configuration that existed before, for both plugins. The files hudson.plugins.emailext.ExtendedEmailPublisher.xml and hudson.tasks.Mailer.xml in the Jenkins home directory both still exist and are populated.

Is this expected behavior?