Revert "Add Jenkins to Prometheus targets"

This reverts commit db1f492198f1070903e9a21d329ad834cbd27b60.

Change-Id: I4db9c61f1061021e02e2e28ce6132449a7cb5586
diff --git a/prometheus/files/prometheus.yml b/prometheus/files/prometheus.yml
index 25c9832..445c476 100644
--- a/prometheus/files/prometheus.yml
+++ b/prometheus/files/prometheus.yml
@@ -243,10 +243,3 @@
       port: {{ target.port }}
   {%- endfor %}
 {%- endif %}
-
-{%- if grains.get('jenkins_plugins', {}).get('prometheus', {}).get('version', False) %}
-  - job_name: jenkins
-    metrics_path: '/prometheus'
-    static_configs:
-    - targets: ['{{ pillar.get('jenkins').get('client').get('master').get('host') }}:{{ pillar.get('jenkins').get('client').get('master').get('port') }}']
-{%- endif %}