Remove legacy references to Cirrus and suspected dead-code. (#50442)

Author: matanlurey

README.md

@@ -1,5 +1,4 @@
-Flutter Engine
-==============
+# Flutter Engine
 
 [![Flutter CI Status](https://flutter-dashboard.appspot.com/api/public/build-status-badge?repo=engine)](https://flutter-dashboard.appspot.com/#/build?repo=engine)
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/flutter/engine/badge)](https://deps.dev/project/github/flutter%2Fengine)
@@ -11,7 +10,7 @@ code, is used by developers and organizations around the world, and is free
 and open source.
 
 The Flutter Engine is a portable runtime for hosting
-[Flutter](https://flutter.dev) applications.  It implements Flutter's core
+[Flutter](https://flutter.dev) applications. It implements Flutter's core
 libraries, including animation and graphics, file and network I/O,
 accessibility support, plugin architecture, and a Dart runtime and compile
 toolchain. Most developers will interact with Flutter via the [Flutter
@@ -31,8 +30,3 @@ the [docs.flutter.dev](https://docs.flutter.dev/).
 Flutter is a fully open source project, and we welcome contributions.
 Information on how to get started can be found at our
 [contributor guide](CONTRIBUTING.md).
-
-[Build Status - Cirrus]: https://api.cirrus-ci.com/github/flutter/engine.svg?branch=main
-
-[Build status]: https://cirrus-ci.com/github/flutter/engine
-

lib/web_ui/dart_test_chrome.yaml

@@ -5,14 +5,3 @@
 platforms:
   - chrome
   - vm
-
-presets:
-  cirrus:
-    override_platforms:
-      chrome:
-        settings:
-          # Required because Cirrus runs us as root.
-          # https://chromium.googlesource.com/chromium/src/+/master/docs/design/sandbox.md
-          # https://docs.travis-ci.com/user/chrome#Sandboxing
-          arguments: --no-sandbox
-    reporter: expanded

lib/web_ui/dev/common.dart

@@ -213,15 +213,12 @@ class DevNull implements StringSink {
   void writeln([Object? obj = '']) {}
 }
 
-/// Whether the felt command is running on Cirrus CI.
-bool get isCirrus => io.Platform.environment['CIRRUS_CI'] == 'true';
-
 /// Whether the felt command is running on LUCI.
 bool get isLuci => io.Platform.environment['LUCI_CONTEXT'] != null;
 
 /// Whether the felt command is running on one of the Continuous Integration
 /// environements.
-bool get isCi => isCirrus || isLuci;
+bool get isCi => isLuci;
 
 const String kChrome = 'chrome';
 const String kEdge = 'edge';

lib/web_ui/dev/environment.dart

@@ -213,22 +213,4 @@ class Environment {
         webUiDartToolDir.path,
         'test_results',
       ));
-
-  /// Path to the script that clones the Flutter repo.
-  io.File get cloneFlutterScript => io.File(pathlib.join(
-        engineToolsDir.path,
-        'clone_flutter.sh',
-      ));
-
-  /// Path to flutter.
-  ///
-  /// For example, this can be used to run `flutter pub get`.
-  ///
-  /// Only use [cloneFlutterScript] to clone flutter to the engine build.
-  io.File get flutterCommand => io.File(pathlib.join(
-        engineDartToolDir.path,
-        'flutter',
-        'bin',
-        'flutter',
-      ));
 }

lib/web_ui/dev/test_platform.dart

@@ -1147,5 +1147,3 @@ class _BrowserEnvironment implements Environment {
   @override
   CancelableOperation<void> displayPause() => _manager._displayPause();
 }
-
-bool get isCirrus => Platform.environment['CIRRUS_CI'] == 'true';

web_sdk/web_test_utils/lib/environment.dart

@@ -158,22 +158,4 @@ class Environment {
         webUiDartToolDir.path,
         'ios_screenshots',
       ));
-
-  /// Path to the script that clones the Flutter repo.
-  io.File get cloneFlutterScript => io.File(pathlib.join(
-        engineToolsDir.path,
-        'clone_flutter.sh',
-      ));
-
-  /// Path to flutter.
-  ///
-  /// For example, this can be used to run `flutter pub get`.
-  ///
-  /// Only use [cloneFlutterScript] to clone flutter to the engine build.
-  io.File get flutterCommand => io.File(pathlib.join(
-        engineDartToolDir.path,
-        'flutter',
-        'bin',
-        'flutter',
-      ));
 }