pkg: analysis aided cleanup

pkg/scheduled_test/test/descriptor/pattern_test.dart

 // Copyright (c) 2013, 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.
 
-import 'dart:async';
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
 import 'package:scheduled_test/descriptor.dart' as d;
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../metatest.dart';
 import 'utils.dart';
 
 String sandbox;
 
 void main() {
   setUpTimeout();
@@ skipping 141 matching lines @@
       expect(errors.length, equals(1));
       expect(errors.first.error, matches(
               r"^Multiple valid entries found in '[^']+' matching "
                   r"\/f\.\./:\n"
               r"\* faa\n"
               r"\* fee\n"
               r"\* foo$"));
     });
   }, passing: ['test 2']);
 }