[OSGeoLive] #2453: Remove tilemill documentation

[OSGeoLive]

#2453: Remove tilemill documentation
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 Reporter:  cvvergara      |      Owner:  osgeolive@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:  OSGeoLive17.0
Component:  Documentation  |   Keywords:
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 tilemill was retiered on v9.5, the documentation is not used and needs to
 be removed.
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Ticket URL: <https://trac.osgeo.org/osgeolive/ticket/2453>
OSGeoLive <https://live.osgeo.org/>
self-contained bootable DVD, USB thumb drive or Virtual Machine based on Lubuntu, that allows you to try a wide variety of open source geospatial software without installing anything.