diff --git a/prometheus/push/deprecated.go b/prometheus/push/deprecated.go
deleted file mode 100644
index 3d62b57..0000000
--- a/prometheus/push/deprecated.go
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2018 The Prometheus Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package push
-
-// This file contains only deprecated code. Remove after v0.9 is released.
-
-import (
-	"bytes"
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"net/url"
-	"os"
-	"strings"
-
-	"github.com/prometheus/common/expfmt"
-	"github.com/prometheus/common/model"
-
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-// FromGatherer triggers a metric collection by the provided Gatherer (which is
-// usually implemented by a prometheus.Registry) and pushes all gathered metrics
-// to the Pushgateway specified by url, using the provided job name and the
-// (optional) further grouping labels (the grouping map may be nil). See the
-// Pushgateway documentation for detailed implications of the job and other
-// grouping labels. Neither the job name nor any grouping label value may
-// contain a "/". The metrics pushed must not contain a job label of their own
-// nor any of the grouping labels.
-//
-// You can use just host:port or ip:port as url, in which case 'http://' is
-// added automatically. You can also include the schema in the URL. However, do
-// not include the '/metrics/jobs/...' part.
-//
-// Note that all previously pushed metrics with the same job and other grouping
-// labels will be replaced with the metrics pushed by this call. (It uses HTTP
-// method 'PUT' to push to the Pushgateway.)
-//
-// Deprecated: Please use a Pusher created with New instead.
-func FromGatherer(job string, grouping map[string]string, url string, g prometheus.Gatherer) error {
-	return push(job, grouping, url, g, "PUT")
-}
-
-// AddFromGatherer works like FromGatherer, but only previously pushed metrics
-// with the same name (and the same job and other grouping labels) will be
-// replaced. (It uses HTTP method 'POST' to push to the Pushgateway.)
-//
-// Deprecated: Please use a Pusher created with New instead.
-func AddFromGatherer(job string, grouping map[string]string, url string, g prometheus.Gatherer) error {
-	return push(job, grouping, url, g, "POST")
-}
-
-func push(job string, grouping map[string]string, pushURL string, g prometheus.Gatherer, method string) error {
-	if !strings.Contains(pushURL, "://") {
-		pushURL = "http://" + pushURL
-	}
-	if strings.HasSuffix(pushURL, "/") {
-		pushURL = pushURL[:len(pushURL)-1]
-	}
-
-	if strings.Contains(job, "/") {
-		return fmt.Errorf("job contains '/': %s", job)
-	}
-	urlComponents := []string{url.QueryEscape(job)}
-	for ln, lv := range grouping {
-		if !model.LabelName(ln).IsValid() {
-			return fmt.Errorf("grouping label has invalid name: %s", ln)
-		}
-		if strings.Contains(lv, "/") {
-			return fmt.Errorf("value of grouping label %s contains '/': %s", ln, lv)
-		}
-		urlComponents = append(urlComponents, ln, lv)
-	}
-	pushURL = fmt.Sprintf("%s/metrics/job/%s", pushURL, strings.Join(urlComponents, "/"))
-
-	mfs, err := g.Gather()
-	if err != nil {
-		return err
-	}
-	buf := &bytes.Buffer{}
-	enc := expfmt.NewEncoder(buf, expfmt.FmtProtoDelim)
-	// Check for pre-existing grouping labels:
-	for _, mf := range mfs {
-		for _, m := range mf.GetMetric() {
-			for _, l := range m.GetLabel() {
-				if l.GetName() == "job" {
-					return fmt.Errorf("pushed metric %s (%s) already contains a job label", mf.GetName(), m)
-				}
-				if _, ok := grouping[l.GetName()]; ok {
-					return fmt.Errorf(
-						"pushed metric %s (%s) already contains grouping label %s",
-						mf.GetName(), m, l.GetName(),
-					)
-				}
-			}
-		}
-		enc.Encode(mf)
-	}
-	req, err := http.NewRequest(method, pushURL, buf)
-	if err != nil {
-		return err
-	}
-	req.Header.Set(contentTypeHeader, string(expfmt.FmtProtoDelim))
-	resp, err := http.DefaultClient.Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-	if resp.StatusCode != 202 {
-		body, _ := ioutil.ReadAll(resp.Body) // Ignore any further error as this is for an error message only.
-		return fmt.Errorf("unexpected status code %d while pushing to %s: %s", resp.StatusCode, pushURL, body)
-	}
-	return nil
-}
-
-// Collectors works like FromGatherer, but it does not use a Gatherer. Instead,
-// it collects from the provided collectors directly. It is a convenient way to
-// push only a few metrics.
-//
-// Deprecated: Please use a Pusher created with New instead.
-func Collectors(job string, grouping map[string]string, url string, collectors ...prometheus.Collector) error {
-	return pushCollectors(job, grouping, url, "PUT", collectors...)
-}
-
-// AddCollectors works like AddFromGatherer, but it does not use a Gatherer.
-// Instead, it collects from the provided collectors directly. It is a
-// convenient way to push only a few metrics.
-//
-// Deprecated: Please use a Pusher created with New instead.
-func AddCollectors(job string, grouping map[string]string, url string, collectors ...prometheus.Collector) error {
-	return pushCollectors(job, grouping, url, "POST", collectors...)
-}
-
-func pushCollectors(job string, grouping map[string]string, url, method string, collectors ...prometheus.Collector) error {
-	r := prometheus.NewRegistry()
-	for _, collector := range collectors {
-		if err := r.Register(collector); err != nil {
-			return err
-		}
-	}
-	return push(job, grouping, url, r, method)
-}
-
-// HostnameGroupingKey returns a label map with the only entry
-// {instance="<hostname>"}. This can be conveniently used as the grouping
-// parameter if metrics should be pushed with the hostname as label. The
-// returned map is created upon each call so that the caller is free to add more
-// labels to the map.
-//
-// Deprecated: Usually, metrics pushed to the Pushgateway should not be
-// host-centric. (You would use https://github.com/prometheus/node_exporter in
-// that case.) If you have the need to add the hostname to the grouping key, you
-// are probably doing something wrong. See
-// https://prometheus.io/docs/practices/pushing/ for details.
-func HostnameGroupingKey() map[string]string {
-	hostname, err := os.Hostname()
-	if err != nil {
-		return map[string]string{"instance": "unknown"}
-	}
-	return map[string]string{"instance": hostname}
-}