[ticket/17414] Remove uninstall method from captcha plugins

PHPBB-17414

phpBB/phpbb/captcha/plugins/captcha_abstract.php

@@ -179,11 +179,6 @@ abstract class captcha_abstract
 		$db->sql_freeresult($result);
 	}
 
-	function uninstall()
-	{
-		$this->garbage_collect(0);
-	}
-
 	function validate()
 	{
 		global $user;

phpBB/phpbb/captcha/plugins/qa.php

@@ -323,14 +323,6 @@ class qa
 		$db->sql_freeresult($result);
 	}
 
-	/**
-	*  API function - we don't drop the tables here, as that would cause the loss of all entered questions.
-	*/
-	function uninstall()
-	{
-		$this->garbage_collect(0);
-	}
-
 	/**
 	*  API function - see what has to be done to validate
 	*/

phpBB/phpbb/captcha/plugins/recaptcha.php

@@ -179,11 +179,6 @@ class recaptcha extends captcha_abstract
 		return $hidden_fields;
 	}
 
-	function uninstall()
-	{
-		$this->garbage_collect(0);
-	}
-
 	function validate()
 	{
 		if (!parent::validate())