don't load commit logs when viewing blob

app/views/refs/_tree.html.haml

@@ -50,12 +50,13 @@
     history.pushState({ path: this.path }, '', "#{@history_path}");
   });
 
+- unless tree.is_blob?
+  :javascript
     // Load last commit log for each file in tree
     $(window).load(function(){
       ajaxGet('#{@logs_path}');
     });
 
-
 - if params[:path] && request.xhr?
   :javascript
     $(window).unbind('popstate');