diff --git a/README.md b/README.md
index 21ea8bf..aa31a91 100644
--- a/README.md
+++ b/README.md
@@ -36,15 +36,6 @@
 $ go get -u gopkg.in/oauth2.v3
 ```
 
-#### Or use [glide](https://github.com/Masterminds/glide)
-
-``` bash
-$ cd $GOPATH/src
-$ git clone https://github.com/go-oauth2/oauth2 gopkg.in/oauth2.v3
-$ cd gopkg.in/oauth2.v3
-$ glide install
-```
-
 ### Create file `server.go`
 
 ``` go
diff --git a/model.go b/model.go
index 3ef41ee..2f960b3 100644
--- a/model.go
+++ b/model.go
@@ -8,7 +8,6 @@ type (
 		GetID() string
 		GetSecret() string
 		GetDomain() string
-		GetExtraData() interface{}
 	}
 
 	// TokenInfo the token information model interface
diff --git a/models/client.go b/models/client.go
index 8e44b27..a3cb525 100644
--- a/models/client.go
+++ b/models/client.go
@@ -21,8 +21,3 @@ func (c *Client) GetSecret() string {
 func (c *Client) GetDomain() string {
 	return c.Domain
 }
-
-// GetExtraData extension data related to the client
-func (c *Client) GetExtraData() interface{} {
-	return nil
-}