Mail/mimeDecode.php library is no longer used, it's already replaced with horde_mimedecode

mail/inc/class.mail_hooks.inc.php

@@ -493,10 +493,7 @@ class mail_hooks
 			'link'=>false,
 			'icon' => false
 		);
-		$showMainScreenStuff = false;
-		// import Message link - only when the required library is available
-		if ((@include_once 'Mail/mimeDecode.php') !== false)
-		{
+		
 		$linkData = array(
 			'menuaction' => 'mail.mail_ui.importMessage',
 		);
@@ -505,7 +502,6 @@ class mail_hooks
 			'import message' => "javascript:egw_openWindowCentered2('".egw::link('/index.php', $linkData,false)."','importMessageDialog',600,100,'no','$appname');",
 		);
 
-		}
 
 		// create account wizard
 		if (self::access('createaccount'))