Plug a couple of leaks

tests/checkout/tree.c

@@ -1095,6 +1095,7 @@ void test_checkout_tree__case_changing_rename(void)
 	cl_assert(index_entry = git_index_get_bypath(index, "README", 0));
 	cl_assert_equal_s("README", index_entry->path);
 
+	git_index_free(index);
 	git_signature_free(signature);
 	git_tree_free(tree);
 	git_commit_free(dir_commit);

tests/object/tree/attributes.c

@@ -38,7 +38,6 @@ void test_object_tree_attributes__group_writable_tree_entries_created_with_an_an
 	git_tree *tree;
 	const git_tree_entry *entry;
 
-	cl_git_pass(git_repository_open(&repo, cl_fixture("deprecated-mode.git")));
 
 	cl_git_pass(git_oid_fromstr(&tid, tree_oid));
 	cl_git_pass(git_tree_lookup(&tree, repo, &tid));