t1006: clean up broken objects

A few of the tests create intentionally broken objects with broken
types. Let's clean them up after we're done with them, so that later
tests don't get confused (we hadn't noticed because this only affects
tests which use --batch-all-objects, but I'm about to add more).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t1006-cat-file.sh

@@ -331,6 +331,11 @@ test_expect_success "Size of broken object is correct" '
 	git cat-file -s --allow-unknown-type $bogus_sha1 >actual &&
 	test_cmp expect actual
 '
+
+test_expect_success 'clean up broken object' '
+	rm .git/objects/$(test_oid_to_path $bogus_sha1)
+'
+
 bogus_type="abcdefghijklmnopqrstuvwxyz1234679"
 bogus_content="bogus"
 bogus_size=$(strlen "$bogus_content")
@@ -348,6 +353,10 @@ test_expect_success "Size of large broken object is correct when type is large"
 	test_cmp expect actual
 '
 
+test_expect_success 'clean up broken object' '
+	rm .git/objects/$(test_oid_to_path $bogus_sha1)
+'
+
 # Tests for git cat-file --follow-symlinks
 test_expect_success 'prep for symlink tests' '
 	echo_without_newline "$hello_content" >morx &&