The control file does not contain enableIntTimes anymore

The control file does not contain enableIntTimes anymore

PG10 gets rid of controlData->enableIntTimes, remove it in pg_filedump
as well. We could add try adding #ifs to still show it for older major
versions, but given that pg_filedump is cross-version compatible for
dumping the recent major's control files except for this change, it
seems more prudent to simply remove it. We don't show other fields like
float4ByVal either, and pg_controldata is a better tool for control file
inspection anyway, so keep the logic in pg_filedump simple.