Remove 'sandbox' flight docs

[adamgreig]

all docs should have timestamp start and ends

[adamgreig]

really? what was the outcome of the discussion on this? we still want to have test docs, and the easiest way to implement that is probably still a 'test' end timestamp

[danielrichman]

I can't remember exactly. I think my motivation for suggesting that all docs have some sort of end time is that it makes garbage collection easier, and forces us to keep the database relatively tidy/stops tonnes of test docs building up. (see #105)

[danielrichman]

Issue #84 depends on this one, since dl-fldigi needs to know how to work out if a doc is testing or not.

[danielrichman]

Closed by 5460517