Cleaning up old export code (#3601)

model/user.go

@@ -371,17 +371,6 @@ func (u *User) IsLDAPUser() bool {
 	return false
 }
 
-func (u *User) PreExport() {
-	u.Password = ""
-	u.AuthData = new(string)
-	*u.AuthData = ""
-	u.LastActivityAt = 0
-	u.LastPingAt = 0
-	u.LastPasswordUpdate = 0
-	u.LastPictureUpdate = 0
-	u.FailedAttempts = 0
-}
-
 // UserFromJson will decode the input and return a User
 func UserFromJson(data io.Reader) *User {
 	decoder := json.NewDecoder(data)