dep ensure for Prometheus deps

vendor/github.com/prometheus/client_golang/examples/simple/Dockerfile

@@ -1,20 +0,0 @@
-# This Dockerfile builds an image for a client_golang example.
-#
-# Use as (from the root for the client_golang repository):
-#    docker build -f examples/$name/Dockerfile -t prometheus/golang-example-$name .
-
-# Builder image, where we build the example.
-FROM golang:1.9.0 AS builder
-WORKDIR /go/src/github.com/prometheus/client_golang
-COPY . .
-WORKDIR /go/src/github.com/prometheus/client_golang/prometheus
-RUN go get -d
-WORKDIR /go/src/github.com/prometheus/client_golang/examples/simple
-RUN CGO_ENABLED=0 GOOS=linux go build -a -tags netgo -ldflags '-w'
-
-# Final image.
-FROM scratch
-LABEL maintainer "The Prometheus Authors <prometheus-developers@googlegroups.com>"
-COPY --from=builder /go/src/github.com/prometheus/client_golang/examples/simple .
-EXPOSE 8080
-ENTRYPOINT ["/simple"]

vendor/github.com/prometheus/client_golang/examples/simple/main.go

@@ -16,16 +16,15 @@ package main
 
 import (
 	"flag"
-	"log"
 	"net/http"
 
-	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/prometheus/client_golang/prometheus"
 )
 
 var addr = flag.String("listen-address", ":8080", "The address to listen on for HTTP requests.")
 
 func main() {
 	flag.Parse()
-	http.Handle("/metrics", promhttp.Handler())
-	log.Fatal(http.ListenAndServe(*addr, nil))
+	http.Handle("/metrics", prometheus.Handler())
+	http.ListenAndServe(*addr, nil)
 }