Update header.html

got rid of twitter card - need to change colors etc.

Author: chaimburstein

arise-source/config/header.html

@@ -23,7 +23,7 @@
         <meta property="article:modified_time" content="{{modified_date}}" />
         <!-- End OpenGraph Metadata -->
 
-        <!-- Twitter Metadata -->
+        <!-- Twitter Metadata
         <meta name="twitter:card" content="summary_large_image" />
         <meta name="twitter:title" content="{{title}} · {{global_name}}" />
         <meta name="twitter:description" content="{{description}}" />