Update _config.yml

_config.yml

@@ -41,7 +41,7 @@ social:
   email: [email protected] # change to your email address
   links:
     # The first element serves as the copyright owner's link
-    - https://twitter.com/username # change to your twitter homepage
+    # - https://twitter.com/username # change to your twitter homepage
     - https://github.com/kihoon71 # change to your github homepage
     # Uncomment below to add more social links
     # - https://www.facebook.com/username