unify exception handling into Utility.Exception

Removed old extensible-exceptions, only needed for very old ghc.

Made webdav use Utility.Exception, to work after some changes in DAV's
exception handling.

Removed Annex.Exception. Mostly this was trivial, but note that
tryAnnex is replaced with tryNonAsync and catchAnnex replaced with
catchNonAsync. In theory that could be a behavior change, since the former
caught all exceptions, and the latter don't catch async exceptions.

However, in practice, nothing in the Annex monad uses async exceptions.
Grepping for throwTo and killThread only find stuff in the assistant,
which does not seem related.

Command.Add.undo is changed to accept a SomeException, and things
that use it for rollback now catch non-async exceptions, rather than
only IOExceptions.

1 files changed, 0 insertions, 1 deletions

diff --git a/Git/Config.hs b/Git/Config.hs
index d998fd1e2..171c3e6c6 100644
--- a/Git/Config.hs
+++ b/Git/Config.hs
@@ -9,7 +9,6 @@ module Git.Config where
 
 import qualified Data.Map as M
 import Data.Char
-import Control.Exception.Extensible
 
 import Common
 import Git