Remove wrong test, issue 575.

tests/language/src/Prefix22NegativeTest.dart

+// Copyright (c) 2011, 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.
+//
+// Unresolved symbols should be reported as an static type warnings.
+// In this variant of test we turn warnings into errors.
+// VMOptions=--fatal-type-errors --enable_type_errors

[regis, 2012/02/23 19:39:33]

The VM neither supports --fatal-type-errors nor --enable_type_errors.

Since this test results in a static type warning, it should not be negative.

+
+#library("Prefix21NegativeTest.dart");
+#import("library12.dart", prefix:"lib12");
+
+class myClass {
+  myClass(lib12.Library13 p) { // static type warning
+  }
+}
+
+main() {
+  new myClass(null);
+}