[RefData][ORI] Removed a few POR, as they have been deprecated by IATA.
 * Belize (BZ)
  + STU/Santa Cruz

 * Costa Rica (CR)
  + FMG/Playa Flamingo
  + LCS/Las Canas
  + SZC/Santa Cruz

 * Guatemala (GT)
  + MCR/Melchor de Mencos
  + PCG/Paso Caballos
  + TKM/Tikal

 * Honduras (HN)
  + ENQ/Soto Cano
  + GUO/Gualaco
  + SET/San Esteban
  + VTA/Victoria

Also fixed the coordinates of SJQ/Sesheke, Zambia (ZM).