Composer: php-markdown updated to 1.8.0

- Classmaps updated

vendor/composer/autoload_namespaces.php

@@ -7,7 +7,6 @@ $baseDir = dirname($vendorDir);
 
 return array(
     'Text' => array($vendorDir . '/pear/text_languagedetect'),
-    'Michelf' => array($vendorDir . '/michelf/php-markdown'),
     'HTMLPurifier' => array($vendorDir . '/ezyang/htmlpurifier/library'),
     'Detection' => array($vendorDir . '/mobiledetect/mobiledetectlib/namespaced'),
 );