In a recent update of rustc, error messages were improved, which
broke one of the compile-fail test cases.
As the exact error message doesn't seem to be important in this case,
remove the .stderr file, so the test case succeeds for both the old
and the new error message.
In a recent update of rustc, error messages were improved, which broke one of the compile-fail test cases.
As the exact error message doesn't seem to be important in this case, remove the .stderr file, so the test case succeeds for both the old and the new error message.