.travis.hlint: I'll duplicate code if I want to
Data.Thyme.Calendar.WeekDate: SundayWeek and MondayWeek

∙ I've no idea why time has these in OrdinalDate.
Data.Thyme.Format.Internal: parser helpers
Data.Thyme.Format: class ParseTime and instances
tests/sanity.hs: rejig Arbitrary Spec; prop_parseTime and Criterion benchmark