actually error on failing miri-pass tests

+ remove a test that never succeeded

tests/compiletest.rs

@@ -105,6 +105,7 @@ fn compile_test() {
                         writeln!(stderr.lock(), "FAILED with exit code {:?}", output.status.code()).unwrap();
                         writeln!(stderr.lock(), "stdout: \n {}", std::str::from_utf8(&output.stdout).unwrap()).unwrap();
                         writeln!(stderr.lock(), "stderr: \n {}", output_err).unwrap();
+                        panic!("failed to run test");
                     }
                 }
                 Err(e) => {

tests/run-pass/issue-33387.rs

@@ -1,19 +0,0 @@
-// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use std::sync::Arc;
-
-trait Foo {}
-
-impl Foo for [u8; 2] {}
-
-fn main() {
-    let _: Arc<Foo + Send> = Arc::new([3, 4]);
-}