[OSGeoLive] #2475: Remove viking documentation

[OSGeoLive]

#2475: Remove viking  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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 viking was retired on v11, the documentation is not used and needs to be
 removed.
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Ticket URL: <https://trac.osgeo.org/osgeolive/ticket/2475>
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