only run debian_rebuilder_prototype on demand, it has mostly served it's purpose...

Signed-off-by: Holger Levsen <holger@layer-acht.org>

job-cfg/reproducible.yaml

@@ -806,7 +806,7 @@
                 - 'debian_rebuilder_prototype':
                     my_description: 'Prototype rebuilder for Debian'
                     my_hname: 'ionos7'
-                    my_timed: '23 H/2 * * *'
+                    my_timed: ''
                     my_parse_rules: '/srv/jenkins/logparse/reproducible.rules'
             my_shell: '/srv/jenkins/bin/jenkins_master_wrapper.sh'
             my_hname: ''