diff --git a/src/Adapter/DbTable.php b/src/Adapter/DbTable.php
deleted file mode 100644
index 0edfbf2..0000000
--- a/src/Adapter/DbTable.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-/**
- * Zend Framework (http://framework.zend.com/)
- *
- * @link      http://github.com/zendframework/zf2 for the canonical source repository
- * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
- * @license   http://framework.zend.com/license/new-bsd New BSD License
- */
-
-namespace Zend\Authentication\Adapter;
-
-/**
- * @deprecated
- */
-class DbTable extends DbTable\CredentialTreatmentAdapter
-{
-}
diff --git a/src/Adapter/Http.php b/src/Adapter/Http.php
index 5a56adc..767643e 100644
--- a/src/Adapter/Http.php
+++ b/src/Adapter/Http.php
@@ -371,23 +371,6 @@ public function authenticate()
         return $result;
     }
 
-    /**
-     * @deprecated
-     * @see Http::challengeClient()
-     * @return Authentication\Result Always returns a non-identity Auth result
-     */
-    protected function _challengeClient()
-    {
-        trigger_error(sprintf(
-            'The method "%s" is deprecated and will be removed in the future; '
-            . 'please use the public method "%s::challengeClient()" instead',
-            __METHOD__,
-            __CLASS__
-        ), E_USER_DEPRECATED);
-
-        return $this->challengeClient();
-    }
-
     /**
      * Challenge Client
      *
diff --git a/test/Adapter/DbTableTest.php b/test/Adapter/DbTableTest.php
deleted file mode 100644
index 2666d27..0000000
--- a/test/Adapter/DbTableTest.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-/**
- * Zend Framework (http://framework.zend.com/)
- *
- * @link      http://github.com/zendframework/zf2 for the canonical source repository
- * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
- * @license   http://framework.zend.com/license/new-bsd New BSD License
- */
-
-namespace ZendTest\Authentication\Adapter;
-
-use Zend\Authentication\Adapter;
-
-/**
- * @group      Zend_Auth
- * @group      Zend_Db_Table
- */
-class DbTableTest extends DbTable\CredentialTreatmentAdapterTest
-{
-    protected function _setupAuthAdapter()
-    {
-        $this->_adapter = new Adapter\DbTable($this->_db, 'users', 'username', 'password');
-    }
-}