Small ui fix

app/views/projects/tree/_blob_item.html.haml

@@ -5,4 +5,4 @@
       = link_to blob_item.name, project_blob_path(@project, tree_join(@id || @commit.id, blob_item.name))
   %td.tree_time_ago.cgray
     = render 'spinner'
-  %td.hidden-xs.tree_commit{ colspan: 2 }
+  %td.hidden-xs.tree_commit

app/views/projects/tree/_tree_item.html.haml

@@ -5,4 +5,4 @@
       = link_to tree_item.name, project_tree_path(@project, tree_join(@id || @commit.id, tree_item.name))
   %td.tree_time_ago.cgray
     = render 'spinner'
-  %td.hidden-xs.tree_commit{ colspan: 2 }
+  %td.hidden-xs.tree_commit