tar-tree: remove deprecated command

"git tar-tree" has been a thin wrapper around "git archive" since commit
fd88d9c (Remove upload-tar and make git-tar-tree a thin wrapper to
git-archive, 2006-09-24), which also made it print a message indicating
that git-tar-tree is deprecated.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t4116-apply-reverse.sh b/t/t4116-apply-reverse.sh
index 2298ece..1e4d438 100755
--- a/t/t4116-apply-reverse.sh
+++ b/t/t4116-apply-reverse.sh
@@ -48,12 +48,12 @@
 
 test_expect_success 'setup separate repository lacking postimage' '
 
-	git tar-tree initial initial | $TAR xf - &&
+	git archive --format=tar --prefix=initial/ initial | $TAR xf - &&
 	(
 		cd initial && git init && git add .
 	) &&
 
-	git tar-tree second second | $TAR xf - &&
+	git archive --format=tar --prefix=second/ second | $TAR xf - &&
 	(
 		cd second && git init && git add .
 	)