Remove dependency on PhantomJS when the default webdriver is not used (#7311)
Remove dependency on PhantomJS when the default webdriver is not used (#7311)


aavanian/bokeh,mindriot101/bokeh,mindriot101/bokeh,ericmjl/bokeh,jakirkham/bokeh,mindriot101/bokeh,jakirkham/bokeh,Karel-van-de-Plassche/bokeh,ericmjl/bokeh,timsnyder/bokeh,Karel-van-de-Plassche/bokeh,bokeh/bokeh,jakirkham/bokeh,bokeh/bokeh,bokeh/bokeh,ericmjl/bokeh,stonebig/bokeh,dennisobrien/bokeh,timsnyder/bokeh,dennisobrien/bokeh,aavanian/bokeh,dennisobrien/bokeh,aavanian/bokeh,ericmjl/bokeh,dennisobrien/bokeh,jakirkham/bokeh,bokeh/bokeh,timsnyder/bokeh,stonebig/bokeh,timsnyder/bokeh,mindriot101/bokeh,jakirkham/bokeh,stonebig/bokeh,Karel-van-de-Plassche/bokeh,aavanian/bokeh,bokeh/bokeh,timsnyder/bokeh,Karel-van-de-Plassche/bokeh,dennisobrien/bokeh,stonebig/bokeh,Karel-van-de-Plassche/bokeh,aavanian/bokeh,ericmjl/bokeh