[monorepo] remove realm checker (#160457)

This needs to work entirely differently in the monorepo world.

.ci.yaml

@@ -1475,20 +1475,6 @@ targets:
           {"dependency": "goldctl", "version": "git_revision:2387d6fff449587eecbb7e45b2692ca0710b63b9"}
         ]
 
-  - name: Linux realm_checker
-    recipe: flutter/flutter_drone
-    timeout: 60
-    properties:
-      add_recipes_cq: "true"
-      shard: realm_checker
-      tags: >
-        ["framework", "hostonly", "shard", "linux"]
-    runIf:
-      - dev/**
-      - packages/flutter_tools/**
-      - bin/**
-      - .ci.yaml
-
   - name: Linux web_benchmarks_canvaskit
     recipe: devicelab/devicelab_drone
     presubmit: false

dev/bots/suite_runners/run_realm_checker_tests.dart

@@ -1,18 +0,0 @@
-// Copyright 2014 The Flutter 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:io' show File;
-
-import 'package:path/path.dart' as path;
-
-import '../utils.dart';
-
-Future<void> realmCheckerTestRunner() async {
-  final String engineRealmFile = path.join(flutterRoot, 'bin', 'internal', 'engine.realm');
-
-  final String engineRealm = File(engineRealmFile).readAsStringSync().trim();
-  if (engineRealm.isNotEmpty) {
-    foundError(<String>['The checked-in engine.realm file must be empty.']);
-  }
-}

dev/bots/test.dart

@@ -65,7 +65,6 @@ import 'suite_runners/run_flutter_packages_tests.dart';
 import 'suite_runners/run_framework_coverage_tests.dart';
 import 'suite_runners/run_framework_tests.dart';
 import 'suite_runners/run_fuchsia_precache.dart';
-import 'suite_runners/run_realm_checker_tests.dart';
 import 'suite_runners/run_skp_generator_tests.dart';
 import 'suite_runners/run_test_harness_tests.dart';
 import 'suite_runners/run_verify_binaries_codesigned_tests.dart';
@@ -150,7 +149,6 @@ Future<void> main(List<String> args) async {
       'flutter_driver_android': runFlutterDriverAndroidTests,
       'flutter_plugins': flutterPackagesRunner,
       'skp_generator': skpGeneratorTestsRunner,
-      'realm_checker': realmCheckerTestRunner,
       'customer_testing': customerTestingRunner,
       'analyze': analyzeRunner,
       'fuchsia_precache': fuchsiaPrecacheRunner,