Confusing warning for disabled toolbar

[jbednar]

For HoloViews 1.15.4 and at least some previous versions, a bogus warning is issued for a disabled toolbar:

import holoviews as hv
hv.extension("bokeh")

color_key = {'w':'aqua',  'b':'lime' }
races     = {'w':'White', 'b':'Black'}

color_points = hv.NdOverlay({races[k]: hv.Points([-80,40]).opts(color=v, size=0) for k, v in color_key.items()})
color_points.opts(clone=True, xaxis=None, yaxis=None, toolbar='disable', height=190, width=135)

Here the toolbar is disabled, so HoloVIews shouldn't be trying to make any tools default, or should otherwise be suppressing this warning.