Removed warnings from test

runtime/observatory/tests/service/regexp_function_test.dart

 // Copyright (c) 2016, 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=
 // VMOptions=--interpret_irregexp
 
-import "package:expect/expect.dart";
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
 
 var regex0;
 var regex;
 
 void script() {
   // Check the internal NUL doesn't trip up the name scrubbing in the vm.
   regex0 = new RegExp("with internal \u{0} NUL");
   regex = new RegExp(r"(\w+)");
   String str = "Parse my string";
   Iterable<Match> matches = regex.allMatches(str);  // Run to generate bytecode.
-  Expect.equals(3, matches.length);
+  expect(matches.length, equals(3));
 }
 
 var tests = [
 
 (Isolate isolate) async {
   Library lib = isolate.rootLibrary;
   await lib.load();
 
   Field field0 = lib.variables.singleWhere((v) => v.name == 'regex0');
   await field0.load();  // No crash due to embedded NUL.
@@ skipping 20 matching lines @@
     var f3 = await regex.externalOneByteFunction.load();
     expect(f3 is ServiceFunction, isTrue);
     var f4 = await regex.externalTwoByteFunction.load();
     expect(f4 is ServiceFunction, isTrue);
   }
 }
 
 ];
 
 main(args) => runIsolateTests(args, tests, testeeBefore: script);
-