Clean up wheel function

Author: blink1073

lib/matplotlib/backends/web_backend/mpl.js

@@ -146,15 +146,14 @@ mpl.figure.prototype._init_canvas = function() {
     rubberband.mouseenter('figure_enter', mouse_event_fn);
     rubberband.mouseleave('figure_leave', mouse_event_fn);
 
-    canvas_div.on("wheel mousewheel", function (event) {
+    canvas_div.on("wheel", function (event) {
         event = event.originalEvent;
         event['data'] = 'scroll'
         if (event.deltaY < 0) {
             event.step = 1;
         } else {
             event.step = -1;
         }
-        console.log(event.step);
         mouse_event_fn(event);
     });