manifests: remove prometheus.io/scrape annotations

These annotations made sense in pre v1.3.0 Prometheus releases, however,
with >=v1.3.0 and the Prometheus Operator these annotations are more
confusing then helpful.

manifests/etcd/etcd-bootkube-gce.yaml

@@ -5,8 +5,6 @@ metadata:
   labels:
     app: etcd
     etcd: k8s
-  annotations:
-    prometheus.io/scrape: 'true'
 spec:
   type: ClusterIP
   clusterIP: None
@@ -29,4 +27,4 @@ subsets:
   ports:
   - name: api
     port: 2379
-    protocol: TCP
+    protocol: TCP

manifests/etcd/etcd-bootkube-vagrant-multi.yaml

@@ -5,8 +5,6 @@ metadata:
   labels:
     app: etcd
     etcd: k8s
-  annotations:
-    prometheus.io/scrape: 'true'
 spec:
   type: ClusterIP
   clusterIP: None
@@ -29,4 +27,4 @@ subsets:
   ports:
   - name: api
     port: 2379
-    protocol: TCP
+    protocol: TCP

manifests/examples/example-app/example-app.yaml

@@ -4,8 +4,6 @@ metadata:
   name: example-app
   labels:
     tier: frontend
-  annotations:
-    prometheus.io/scrape: 'true'
 spec: 
   selector: 
     app: example-app 

manifests/exporters/kube-state-metrics-svc.yaml

@@ -1,8 +1,6 @@
 apiVersion: v1
 kind: Service
 metadata:
-  annotations:
-    prometheus.io/scrape: 'true'
   labels:
     app: kube-state-metrics
   name: kube-state-metrics

manifests/exporters/node-exporter-svc.yaml

@@ -3,8 +3,6 @@ kind: Service
 metadata:
   labels:
     app: node-exporter
-  annotations:
-    prometheus.io/scrape: 'true'
   name: node-exporter
 spec:
   type: ClusterIP

manifests/grafana/grafana-svc.yaml

@@ -4,8 +4,6 @@ metadata:
   name: grafana
   labels:
     app: grafana
-  annotations:
-    prometheus.io/scrape: 'true'
 spec:
   type: NodePort
   ports:
@@ -14,4 +12,4 @@ spec:
     protocol: TCP
     nodePort: 30902
   selector:
-    app: grafana
+    app: grafana

manifests/k8s/kube-controller-manager-bootkube-vagrant-multi.yaml

@@ -4,8 +4,6 @@ metadata:
   name: kube-controller-manager-prometheus-discovery
   labels:
     k8s-app: kube-controller-manager
-  annotations:
-    prometheus.io/scrape: 'true'
 spec:
   selector:
     k8s-app: kube-controller-manager

manifests/k8s/kube-scheduler-bootkube-vagrant-multi.yaml

@@ -4,8 +4,6 @@ metadata:
   name: kube-scheduler-prometheus-discovery
   labels:
     k8s-app: kube-scheduler
-  annotations:
-    prometheus.io/scrape: 'true'
 spec:
   selector:
     k8s-app: kube-scheduler