linter: tidy an import

Change-Id: I58704b3183c59144f643bdeafe134ba410658a11
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/389021
Reviewed-by: Phil Quitslund <[email protected]>
Auto-Submit: Samuel Rawlins <[email protected]>
Commit-Queue: Phil Quitslund <[email protected]>

Author: srawlins

pkg/linter/tool/machine.dart

@@ -14,8 +14,8 @@ import 'package:linter/src/rules.dart';
 import 'package:linter/src/utils.dart';
 import 'package:yaml/yaml.dart';
 
-import '../tool/util/path_utils.dart';
 import 'messages_info.dart';
+import 'util/path_utils.dart';
 
 /// Generates a list of built-in lint rules in JSON suitable for
 /// consumption by other tools.