Remove --compile_all from all but one service test

runtime/observatory/tests/service/async_continuation_test.dart

Index: runtime/observatory/tests/service/async_continuation_test.dart
diff --git a/runtime/observatory/tests/service/async_continuation_test.dart b/runtime/observatory/tests/service/async_continuation_test.dart
index 781f7ca117088fea0b46dc0baa7e18acb65b731e..dfbad2d2cf6ff49d4f035be2624f0e99b88523cd 100644
--- a/runtime/observatory/tests/service/async_continuation_test.dart
+++ b/runtime/observatory/tests/service/async_continuation_test.dart
@@ -1,7 +1,7 @@
 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// VMOptions=--compile_all --error_on_bad_type --error_on_bad_override --verbose-debug
+// VMOptions=--error_on_bad_type --error_on_bad_override --verbose-debug
 
 import 'dart:async';
 import 'dart:developer';