removed additinal empty string

mastoapi.c

@@ -586,8 +586,6 @@ xs_dict *mastoapi_account(const xs_dict *actor)
         acct = xs_dict_append(acct, "emojis", eml);
     }
 
-    acct = xs_dict_append(acct, "header", "");
-
     return acct;
 }