remove support for directory < 1.2.7

The build depends already require 1.2.7, so these old ifdefs must be
unnecessary.

Test/Framework.hs

@@ -326,11 +326,7 @@ setTestEnv a = Utility.Tmp.Dir.withTmpDir "testhome" $ \tmphome -> do
 	a
 
 removeDirectoryForCleanup :: FilePath -> IO ()
-#if MIN_VERSION_directory(1,2,7)
 removeDirectoryForCleanup = removePathForcibly
-#else
-removeDirectoryForCleanup = removeDirectoryRecursive
-#endif
 
 cleanup :: FilePath -> IO ()
 cleanup dir = whenM (doesDirectoryExist dir) $ do

Upgrade/V7.hs

@@ -78,11 +78,7 @@ removeOldDb :: FilePath -> Annex ()
 removeOldDb db =
 	whenM (liftIO $ doesDirectoryExist db) $ do
 		v <- liftIO $ tryNonAsync $
-#if MIN_VERSION_directory(1,2,7)
 			removePathForcibly db
-#else
-			removeDirectoryRecursive db
-#endif
 		case v of
 			Left ex -> giveup $ "Failed removing old database directory " ++ db ++ " during upgrade (" ++ show ex ++ ") -- delete that and re-run git-annex to finish the upgrade."
 			Right () -> return ()