diff --git a/src/Exception/UnauthorizedClientException.php b/src/Exception/UnauthorizedClientException.php
deleted file mode 100644
index fd1f18c3..00000000
--- a/src/Exception/UnauthorizedClientException.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-/**
- * OAuth 2.0 Unauthorized Client Exception
- *
- * @package     league/oauth2-server
- * @author      Alex Bilbie <hello@alexbilbie.com>
- * @copyright   Copyright (c) Alex Bilbie
- * @license     http://mit-license.org/
- * @link        https://github.com/thephpleague/oauth2-server
- */
-
-namespace League\OAuth2\Server\Exception;
-
-/**
- * Exception class
- */
-class UnauthorizedClientException extends OAuthException
-{
-    /**
-     * {@inheritdoc}
-     */
-    public $httpStatusCode = 400;
-
-    /**
-     * {@inheritdoc}
-     */
-    public $errorType = 'unauthorized_client';
-
-    /**
-     * {@inheritdoc}
-     */
-    public function __construct()
-    {
-        parent::__construct('The client is not authorized to request an access token using this method.');
-    }
-}
diff --git a/src/Exception/UnsupportedResponseTypeException.php b/src/Exception/UnsupportedResponseTypeException.php
deleted file mode 100644
index 8707f0c5..00000000
--- a/src/Exception/UnsupportedResponseTypeException.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-/**
- * OAuth 2.0 Unsupported Response Type Exception
- *
- * @package     league/oauth2-server
- * @author      Alex Bilbie <hello@alexbilbie.com>
- * @copyright   Copyright (c) Alex Bilbie
- * @license     http://mit-license.org/
- * @link        https://github.com/thephpleague/oauth2-server
- */
-
-namespace League\OAuth2\Server\Exception;
-
-/**
- * Exception class
- */
-class UnsupportedResponseTypeException extends OAuthException
-{
-    /**
-     * {@inheritdoc}
-     */
-    public $httpStatusCode = 400;
-
-    /**
-     * {@inheritdoc}
-     */
-    public $errorType = 'unsupported_response_type';
-
-    /**
-     * {@inheritdoc}
-     */
-    public function __construct($parameter, $redirectUri = null)
-    {
-        parent::__construct('The authorization server does not support obtaining an access token using this method.');
-        $this->redirectUri = $redirectUri;
-    }
-}