[analyzer] fix a copy paste doc issue and 2 unused imports

Change-Id: I20f4ae5454c2bceafd3b86e279357dee3b321006
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103644
Reviewed-by: Konstantin Shcheglov <[email protected]>
Commit-Queue: Devon Carew <[email protected]>

Author: devoncarew

pkg/analysis_server/lib/src/server/driver.dart

@@ -203,7 +203,7 @@ class Driver implements ServerStarter {
       "disable-server-feature-completion";
 
   /**
-   * The name of the option to disable the completion feature.
+   * The name of the option to disable the search feature.
    */
   static const String DISABLE_SERVER_FEATURE_SEARCH =
       "disable-server-feature-search";

pkg/analysis_server/test/integration/analysis/get_hover_test.dart

@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:io';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:path/path.dart' as path;

pkg/analyzer/lib/src/error/inheritance_override.dart

@@ -9,7 +9,6 @@ import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/error/listener.dart';
-import 'package:analyzer/src/dart/ast/ast.dart';
 import 'package:analyzer/src/dart/constant/value.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/inheritance_manager2.dart';