Update c3.js and c3.min.js

c3.js

@@ -2541,7 +2541,6 @@
 
         // rects for mouseover
         var eventRects = $$.main.select('.' + CLASS.eventRects)
-                .style('cursor', config.zoom_enabled ? config.axis_rotated ? 'ns-resize' : 'ew-resize' : null)
                 .classed(CLASS.eventRectsMultiple, isMultipleX)
                 .classed(CLASS.eventRectsSingle, !isMultipleX);