clean up imports for cc.models
clean up imports for cc.models

jayoshih/content-curation,jayoshih/content-curation,DXCanas/content-curation,fle-internal/content-curation,DXCanas/content-curation,jayoshih/content-curation,fle-internal/content-curation,fle-internal/content-curation,DXCanas/content-curation,jayoshih/content-curation,DXCanas/content-curation,fle-internal/content-curation