           if link.value() == 0.0 then 'none' else 'inline'
         )
 
-
-      # then move the link labels and update their value
-      @links.selectAll("path")
-        .attr('data-tooltip', (d) =>
-          html = "#{d.left.label()} -> #{d.right.label()}"
-          html += "<br/>"
-          html += Metric.autoscale_value d.value(), 'PJ', 2)
-
 class D3.sankey.NodeList extends Backbone.Collection
   model: D3.sankey.Node
 

        .style("fill", "none")
        .style("opacity", selectedLinkOpacity)
        .attr("d", (link) => @link_line link.path_points())
        .on("mouseover", @link_mouseover)
        .on("mouseout", @node_mouseout)

      $('g.link path').qtip
        content: -> $(this).attr('data-tooltip')
        show:
          event: 'mouseover' # silly IE
        hide:
          event: 'mouseout'  # silly IE
        position:
          target: 'mouse'
          my: 'bottom right'
          at: 'top center'

      return links

    draw_nodes: =>

        .transition()
        .duration(200)
        .style("opacity", selectedLinkOpacity)

    # this method is called every time we're updating the chart
    refresh: =>
