diff --git a/passwordcredentials/passwordcredentials.go b/passwordcredentials/passwordcredentials.go
deleted file mode 100644
index 5deef2e..0000000
--- a/passwordcredentials/passwordcredentials.go
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package passwordcredentials implements the OAuth2.0 "password credentials" token flow.
-// See https://tools.ietf.org/html/rfc6749#section-4.3
-package passwordcredentials
-
-import (
-	"net/http"
-	"net/url"
-	"strings"
-
-	"golang.org/x/net/context"
-	"golang.org/x/oauth2"
-	"golang.org/x/oauth2/internal"
-)
-
-// Config describes a Resource Owner Password Credentials OAuth2 flow, with the
-// client application information, resource owner credentials and the server's
-// endpoint URLs.
-type Config struct {
-	// ClientID is the application's ID.
-	ClientID string
-
-	// ClientSecret is the application's secret.
-	ClientSecret string
-
-	// Resource owner username
-	Username string
-
-	// Resource owner password
-	Password string
-
-	// Endpoint contains the resource server's token endpoint
-	// URLs. These are constants specific to each server and are
-	// often available via site-specific packages, such as
-	// google.Endpoint or github.Endpoint.
-	Endpoint oauth2.Endpoint
-
-	// Scope specifies optional requested permissions.
-	Scopes []string
-}
-
-// Client returns an HTTP client using the provided token.
-// The token will auto-refresh as necessary. The underlying
-// HTTP transport will be obtained using the provided context.
-// The returned client and its Transport should not be modified.
-func (c *Config) Client(ctx context.Context) *http.Client {
-	return oauth2.NewClient(ctx, c.TokenSource(ctx))
-}
-
-// TokenSource returns a TokenSource that returns t until t expires,
-// automatically refreshing it as necessary using the provided context and the
-// client ID and client secret.
-//
-// Most users will use Config.Client instead.
-func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource {
-	source := &tokenSource{
-		ctx:  ctx,
-		conf: c,
-	}
-	return oauth2.ReuseTokenSource(nil, source)
-}
-
-type tokenSource struct {
-	ctx  context.Context
-	conf *Config
-}
-
-// Token refreshes the token by using a new password credentials request.
-// tokens received this way do not include a refresh token
-func (c *tokenSource) Token() (*oauth2.Token, error) {
-	tk, err := internal.RetrieveToken(c.ctx, c.conf.ClientID, c.conf.ClientSecret, c.conf.Endpoint.TokenURL, url.Values{
-		"grant_type": {"password"},
-		"username":   {c.conf.Username},
-		"password":   {c.conf.Password},
-		"scope":      internal.CondVal(strings.Join(c.conf.Scopes, " ")),
-	})
-	if err != nil {
-		return nil, err
-	}
-	t := &oauth2.Token{
-		AccessToken:  tk.AccessToken,
-		TokenType:    tk.TokenType,
-		RefreshToken: tk.RefreshToken,
-		Expiry:       tk.Expiry,
-	}
-	return t.WithExtra(tk.Raw), nil
-}
diff --git a/passwordcredentials/passwordcredentials_test.go b/passwordcredentials/passwordcredentials_test.go
deleted file mode 100644
index f4cb19c..0000000
--- a/passwordcredentials/passwordcredentials_test.go
+++ /dev/null
@@ -1,105 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package passwordcredentials
-
-import (
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"golang.org/x/oauth2"
-)
-
-func newConf(url string) *Config {
-	return &Config{
-		ClientID:     "CLIENT_ID",
-		ClientSecret: "CLIENT_SECRET",
-		Username:     "USERNAME",
-		Password:     "PASSWORD",
-		Scopes:       []string{"scope1", "scope2"},
-		Endpoint: oauth2.Endpoint{
-			TokenURL: url + "/token",
-		},
-	}
-}
-
-const stubAccessToken = "90d64460d14870c08c81352a05dedd3465940a7c"
-
-type mockTransport struct {
-	rt func(req *http.Request) (resp *http.Response, err error)
-}
-
-func (t *mockTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
-	return t.rt(req)
-}
-
-func TestTokenRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() != "/token" {
-			t.Errorf("authenticate client request URL = %q; want %q", r.URL, "/token")
-		}
-		headerAuth := r.Header.Get("Authorization")
-		if headerAuth != "Basic Q0xJRU5UX0lEOkNMSUVOVF9TRUNSRVQ=" {
-			t.Errorf("Unexpected authorization header, %v is found.", headerAuth)
-		}
-		if got, want := r.Header.Get("Content-Type"), "application/x-www-form-urlencoded"; got != want {
-			t.Errorf("Content-Type header = %q; want %q", got, want)
-		}
-		body, err := ioutil.ReadAll(r.Body)
-		if err != nil {
-			r.Body.Close()
-		}
-		if err != nil {
-			t.Errorf("failed reading request body: %s.", err)
-		}
-		want := "client_id=CLIENT_ID&grant_type=password&password=PASSWORD&scope=scope1+scope2&username=USERNAME"
-		if string(body) != want {
-			t.Errorf("payload = %q; want %q", string(body), want)
-		}
-		w.Header().Set("Content-Type", "application/x-www-form-urlencoded")
-		w.Write([]byte(fmt.Sprintf("access_token=%s&token_type=bearer", stubAccessToken)))
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	tok, err := conf.TokenSource(oauth2.NoContext).Token()
-	if err != nil {
-		t.Error(err)
-	}
-	if !tok.Valid() {
-		t.Fatalf("token invalid. got: %#v", tok)
-	}
-	if tok.AccessToken != stubAccessToken {
-		t.Errorf("Access token = %q; want %q", tok.AccessToken, stubAccessToken)
-	}
-	if tok.TokenType != "bearer" {
-		t.Errorf("token type = %q; want %q", tok.TokenType, "bearer")
-	}
-}
-
-func TestTokenRefreshRequest(t *testing.T) {
-	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.String() == "/somethingelse" {
-			return
-		}
-		if r.URL.String() != "/token" {
-			t.Errorf("Unexpected token refresh request URL, %v is found.", r.URL)
-		}
-		headerContentType := r.Header.Get("Content-Type")
-		if headerContentType != "application/x-www-form-urlencoded" {
-			t.Errorf("Unexpected Content-Type header, %v is found.", headerContentType)
-		}
-		body, _ := ioutil.ReadAll(r.Body)
-		want := "client_id=CLIENT_ID&grant_type=password&password=PASSWORD&scope=scope1+scope2&username=USERNAME"
-		if string(body) != want {
-			t.Errorf("payload = %q; want %q", string(body), want)
-		}
-	}))
-	defer ts.Close()
-	conf := newConf(ts.URL)
-	c := conf.Client(oauth2.NoContext)
-	c.Get(ts.URL + "/somethingelse")
-}