Remove some more library directives

pkg/analysis_server/test/services/correction/levenshtein_test.dart

 // Copyright (c) 2014, 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.
 
-library test.services.correction.levenshtein;
-
 import 'package:analysis_server/src/services/correction/levenshtein.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(LevenshteinTest);
   });
 }
 
@@ skipping 42 matching lines @@
 
   void test_same() {
     expect(levenshtein('', '', 5), 0);
     expect(levenshtein('test', 'test', 5), 0);
   }
 
   void test_same_caseInsensitive() {
     expect(levenshtein('test', 'Test', 5, caseSensitive: false), 0);
   }
 }