Don't generate unnecessarily large imagery.json
Don't generate unnecessarily large imagery.json

ngageoint/hootenanny-ui,AndreasHae/iD,1ec5/iD,energiekollektiv/openmod.sh-id,ngageoint/hootenanny-ui,mapmeld/iD,edpop/iD,kartta-labs/iD,zbycz/iD,zbycz/iD,andreic-telenav/iD,energiekollektiv/openmod.sh-id,edpop/iD,edpop/iD,bagage/iD,bagage/iD,morray/iD,digidem/iD,mapmeld/iD,digidem/iD,andreic-telenav/iD,bagage/iD,kepta/iD,kartta-labs/iD,openstreetmap/iD,openstreetmap/iD,ngageoint/hootenanny-ui,morray/iD,AndreasHae/iD,openstreetmap/iD,1ec5/iD,1ec5/iD,kepta/iD,AndreasHae/iD,kartta-labs/iD,mapmeld/iD