Revert "[flutter_tools] enable CK restart tests (#71598)"

This reverts commit e8b87f7cd222aab2a8265122a06e033c546249b4.
diff --git a/packages/flutter_tools/test/src/common.dart b/packages/flutter_tools/test/src/common.dart
index 53a8419..d41f79d 100644
--- a/packages/flutter_tools/test/src/common.dart
+++ b/packages/flutter_tools/test/src/common.dart
@@ -77,7 +77,7 @@
       throw invalidScript();
   }
 
-  final List<String> parts = path.split(LocalFileSystem.instance.path.fromUri(scriptUri));
+  final List<String> parts = path.split(globals.fs.path.fromUri(scriptUri));
   final int toolsIndex = parts.indexOf('flutter_tools');
   if (toolsIndex == -1) {
     throw invalidScript();
diff --git a/packages/flutter_tools/test/web.shard/hot_reload_web_test.dart b/packages/flutter_tools/test/web.shard/hot_reload_web_test.dart
index c319c74..a715a66 100644
--- a/packages/flutter_tools/test/web.shard/hot_reload_web_test.dart
+++ b/packages/flutter_tools/test/web.shard/hot_reload_web_test.dart
@@ -68,5 +68,5 @@
     } finally {
       await subscription.cancel();
     }
-  });
+  }, skip: true); // https://github.com/flutter/flutter/issues/70486
 }