[MacPorts] #30201: Drop +postgres83 variant from mediawiki

[MacPorts]

#30201: Drop +postgres83 variant from mediawiki
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 Reporter:  chad@…                  |       Owner:  macports-tickets@…                   
     Type:  defect                  |      Status:  new                                  
 Priority:  Normal                  |   Milestone:                                       
Component:  ports                   |     Version:  1.9.2                                
 Keywords:                          |        Port:  mediawiki                            
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Changes (by blb@…):

  * owner:  blb@… => macports-tickets@…


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Ticket URL: <https://trac.macports.org/ticket/30201#comment:5>
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