Remove unused social accounts

Author: DiogoRibeiro7

_config.yml

@@ -81,11 +81,11 @@ baidu_site_verification  :
 
 # Social Sharing
 twitter:
-  username               : diogoribeiro7
+  username               :
 facebook:
-  username               : diogoribeiro7
+  username               :
   app_id                 :
-  publisher              : https://www.facebook.com/diogoribeiro7
+  publisher              :
 og_image                 : /assets/images/data-science.png
 # For specifying social profiles
 # - https://developers.google.com/structured-data/customize/social-profiles