The purpose of the packs is to deliver a "all in one product" for those who don't care to have very detailed airports . It realy improve the area with boats vegetation work , POI and so on...
But you may want to have some detailed airports and remove this one in the packs.
For ingame Marketplace purchase :
General parameters -> 1- Advanced options -> experimental -> 2 - Active Package reorder tool clic on
3- Then move order of your sceneries. 
For Simmarket or Justflight Purchase : You just have to remove : obj.icao code.bgl in scenery folder of the pack .