Reduce the test scope of get_fixes_test.dart.

BUG=
R=brianwilkerson@google.com

Review-Url: https://codereview.chromium.org/2932343002 .

pkg/analysis_server/test/integration/edit/get_fixes_test.dart

@@ -2,8 +2,6 @@
 // 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 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
@@ -39,20 +37,10 @@ Future f;
     expect(fix.error.code, 'undefined_class');
     expect(fix.fixes, isNotEmpty);
 
-    // apply the fix, expect that the new code has no errors
     SourceChange change = fix.fixes.singleWhere(
         (SourceChange change) => change.message.startsWith('Import '));
     expect(change.edits, hasLength(1));
     expect(change.edits.first.edits, hasLength(1));
-    SourceEdit edit = change.edits.first.edits.first;
-    text = text.replaceRange(edit.offset, edit.end, edit.replacement);
-
-    // save the fixed text as an overlay
-    Future analysisFinishedFuture = analysisFinished;
-    sendAnalysisUpdateContent({pathname: new AddContentOverlay(text)});
-    await analysisFinishedFuture;
-
-    expect(currentAnalysisErrors[pathname], isEmpty);
   }
 
   test_no_fixes() async {