remove unused closed_to_status, status_to_closed_flags
remove unused closed_to_status, status_to_closed_flags

closed_to_status call removed in c10632dc65294220d22e2a5814e5031c93a4d3ad.
status_to_closed_flags call removed in 37df6ea57fecbdf8dc4e446febb64043de13815f.

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