Do not specify default service for S3 assetstore type
Do not specify default service for S3 assetstore type

jbeezley/girder,Xarthisius/girder,Xarthisius/girder,RafaelPalomar/girder,manthey/girder,data-exp-lab/girder,data-exp-lab/girder,Kitware/girder,girder/girder,RafaelPalomar/girder,data-exp-lab/girder,jbeezley/girder,manthey/girder,jbeezley/girder,kotfic/girder,RafaelPalomar/girder,RafaelPalomar/girder,kotfic/girder,girder/girder,Kitware/girder,Xarthisius/girder,kotfic/girder,manthey/girder,Xarthisius/girder,Kitware/girder,Xarthisius/girder,girder/girder,kotfic/girder,Kitware/girder,data-exp-lab/girder,jbeezley/girder,girder/girder,RafaelPalomar/girder,kotfic/girder,manthey/girder,data-exp-lab/girder