Revert "Revert "remove meta fields from to_json""
Revert "Revert "remove meta fields from to_json""

This reverts commit 1930044314a4f1869729d45efc1cd3533256cb67.

dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq