Finish simplifying group data loading
Finish simplifying group data loading

ClinGen/clincoded,ClinGen/clincoded,ClinGen/clincoded,philiptzou/clincoded,philiptzou/clincoded,ClinGen/clincoded,philiptzou/clincoded,philiptzou/clincoded,philiptzou/clincoded,ClinGen/clincoded