removing duplicate event handler
removing duplicate event handler

SylvainCorlay/bqplot,bloomberg/bqplot,ssunkara1/bqplot,bloomberg/bqplot,ssunkara1/bqplot,bloomberg/bqplot,SylvainCorlay/bqplot,ChakriCherukuri/bqplot,ChakriCherukuri/bqplot,SylvainCorlay/bqplot,ChakriCherukuri/bqplot,dmadeka/bqplot,dmadeka/bqplot