Remove unconfigured link from website (#18)

Author: galtm

config.toml

@@ -52,7 +52,7 @@ theme = "hyde-hyde"
     # instagram = "<username>"
     # xing = "<username>"
     # linkedin = "<username>"
-    twitter = "<username>"
+    # twitter = "<username>"
     # facebook = "<username>"
     stackoverflow = "questions/tagged/xspec"
     # telegram = "<username>"