Remove references to Google+ in Google provider

providers/google/google.go

@@ -17,7 +17,7 @@ import (
 
 const endpointProfile string = "https://www.googleapis.com/oauth2/v2/userinfo"
 
-// New creates a new Google+ provider, and sets up important connection details.
+// New creates a new Google provider, and sets up important connection details.
 // You should always call `google.New` to get a new Provider. Never try to create
 // one manually.
 func New(clientKey, secret, callbackURL string, scopes ...string) *Provider {
@@ -31,7 +31,7 @@ func New(clientKey, secret, callbackURL string, scopes ...string) *Provider {
 	return p
 }
 
-// Provider is the implementation of `goth.Provider` for accessing Google+.
+// Provider is the implementation of `goth.Provider` for accessing Google.
 type Provider struct {
 	ClientKey    string
 	Secret       string

providers/google/session.go

@@ -9,23 +9,23 @@ import (
 	"github.com/markbates/goth"
 )
 
-// Session stores data during the auth process with Google+.
+// Session stores data during the auth process with Google.
 type Session struct {
 	AuthURL      string
 	AccessToken  string
 	RefreshToken string
 	ExpiresAt    time.Time
 }
 
-// GetAuthURL will return the URL set by calling the `BeginAuth` function on the Google+ provider.
+// GetAuthURL will return the URL set by calling the `BeginAuth` function on the Google provider.
 func (s Session) GetAuthURL() (string, error) {
 	if s.AuthURL == "" {
 		return "", errors.New(goth.NoAuthUrlErrorMessage)
 	}
 	return s.AuthURL, nil
 }
 
-// Authorize the session with Google+ and return the access token to be stored for future use.
+// Authorize the session with Google and return the access token to be stored for future use.
 func (s *Session) Authorize(provider goth.Provider, params goth.Params) (string, error) {
 	p := provider.(*Provider)
 	token, err := p.config.Exchange(goth.ContextForClient(p.Client()), params.Get("code"))