remove i386ancient and need at least debian stable to build

* Removed the i386ancient standalone tarball build for linux, which
  was increasingly unable to support new git-annex features.
* Removed support for building with ghc older than 9.0.2,
  and with older versions of haskell libraries than are in current Debian
  stable.
* stack.yaml: Update to lts-23.2.

Note that i386ancient was targeting linux 2.6.32, which has been EOL for
over 9 years now. Any old system still using such a kernel is certainly highly
insecure. And I suspect i386ancient had its own insecurities due to haskell
libraries and C libraries not having been updated.

Utility/TimeStamp.hs

@@ -5,8 +5,6 @@
  - License: BSD-2-clause
  -}
 
-{-# LANGUAGE CPP #-}
-
 module Utility.TimeStamp (
 	parserPOSIXTime,
 	parsePOSIXTime,
@@ -62,11 +60,7 @@ formatPOSIXTime fmt t = formatTime defaultTimeLocale fmt (posixSecondsToUTCTime
 
 {- Truncate the resolution to the specified number of decimal places. -}
 truncateResolution :: Int -> POSIXTime -> POSIXTime
-#if MIN_VERSION_time(1,9,1)
 truncateResolution n t = secondsToNominalDiffTime $
 	fromIntegral ((truncate (nominalDiffTimeToSeconds t * d)) :: Integer) / d
   where
 	d = 10 ^ n
-#else
-truncateResolution _ t = t
-#endif