Revert "Benchmark for un-triaged image results on Flutter Gold (#40634)" (#41232)

This reverts commit 43932aa2.

dev/devicelab/bin/tasks/flutter_gold_triage.dart

-// Copyright 2019 The Chromium Authors. 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 'dart:convert';
-import 'dart:io';
-
-import 'package:flutter_devicelab/framework/framework.dart';
-
-const String _kTriageCountKey = 'count';
-
-Future<TaskResult> getTriageCount() async {
-  final HttpClient skiaClient = HttpClient();
-  int digestCount = 0;
-  try {
-    final HttpClientRequest request = await skiaClient.getUrl(Uri.parse(
-      'https://flutter-gold.skia.org/json/trstatus'
-    ));
-    final HttpClientResponse response = await request.close();
-    final String responseBody = await response.transform(utf8.decoder).join();
-    final Map<String, dynamic> json = jsonDecode(responseBody);
-    digestCount = json['corpStatus'][0]['untriagedCount'];
-  } catch(e) {
-    return TaskResult.failure(e.toString());
-  }
-  return TaskResult.success(
-    <String, dynamic>{_kTriageCountKey: digestCount},
-    benchmarkScoreKeys: <String>[_kTriageCountKey],
-  );
-}
-
-Future<void> main() async {
-  await task(() => getTriageCount());
-}

dev/devicelab/manifest.yaml

@@ -655,12 +655,6 @@ tasks:
     stage: devicelab
     required_agent_capabilities: ["linux/android"]
 
-  flutter_gold_triage:
-    description: >
-      Checks the number of un-triaged image digests from Flutter Gold.
-    stage: devicelab
-    required_agent_capabilities: ["linux/android"]
-
   # run_without_leak_linux:
   #   description: >
   #     Checks that `flutter run` does not leak dart on Linux.