reftable: drop stray printf in readwrite_test

Signed-off-by: Han-Wen Nienhuys <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: hanwen

reftable/readwrite_test.c

@@ -662,7 +662,6 @@ static void test_write_key_order(void)
 	err = reftable_writer_add_ref(w, &refs[0]);
 	EXPECT_ERR(err);
 	err = reftable_writer_add_ref(w, &refs[1]);
-	printf("%d\n", err);
 	EXPECT(err == REFTABLE_API_ERROR);
 	reftable_writer_close(w);
 	reftable_writer_free(w);