Update _config.yml

Commented twitter link on footer

Author: agarcialeon

_config.yml

@@ -75,7 +75,7 @@ social-network-links:
   rss: true
 #  email: "someone@example.com"
   github: "https://github.com/UnityCommunity"
-  twitter: daattali
+#  twitter: daattali
 #  reddit: yourname
 #  youtube: user/deanat78