CRM-12578 - Remove extras.css

CRM/Core/Resources.php

@@ -495,8 +495,6 @@ class CRM_Core_Resources {
       }
       if (!CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, 'disable_core_css')) {
         $this->addStyleFile('civicrm', 'css/civicrm.css', -99, $region);
-        // extras.css is deprecated. Don't use it.
-        $this->addStyleFile('civicrm', 'css/extras.css', -98, $region);
       }
     }
     return $this;

css/extras.css

-/**
- * @deprecated
- * This file is deprecated and support will be removed for it in version 4.5
- * Don't use it. Instead configure a custom css url at /civicrm/admin/setting/url?reset=1
- */