[devicelab] Remove legacy devicelab manifest logic (#101554)

Author: Casey Hillers

dev/devicelab/bin/run.dart

@@ -7,7 +7,6 @@ import 'dart:io';
 
 import 'package:args/args.dart';
 import 'package:flutter_devicelab/framework/ab.dart';
-import 'package:flutter_devicelab/framework/manifest.dart';
 import 'package:flutter_devicelab/framework/runner.dart';
 import 'package:flutter_devicelab/framework/task_result.dart';
 import 'package:flutter_devicelab/framework/utils.dart';
@@ -63,16 +62,6 @@ Future<void> main(List<String> rawArgs) async {
   /// Path to write test results to.
   final String? resultsPath = args['results-file'] as String?;
 
-  if (!args.wasParsed('task')) {
-    if (args.wasParsed('stage') || args.wasParsed('all')) {
-      addTasks(
-        tasks: loadTaskManifest().tasks,
-        args: args,
-        taskNames: taskNames,
-      );
-    }
-  }
-
   if (args.wasParsed('list')) {
     for (int i = 0; i < taskNames.length; i++) {
       print('${(i + 1).toString().padLeft(3)} - ${taskNames[i]}');
@@ -209,29 +198,6 @@ File _uniqueFile(String filenameTemplate) {
   return file;
 }
 
-void addTasks({
-  required List<ManifestTask> tasks,
-  required ArgResults args,
-  required List<String> taskNames,
-}) {
-  if (args.wasParsed('continue-from')) {
-    final int index = tasks.indexWhere((ManifestTask task) => task.name == args['continue-from']);
-    if (index == -1) {
-      throw Exception('Invalid task name "${args['continue-from']}"');
-    }
-    tasks.removeRange(0, index);
-  }
-  // Only start skipping if user specified a task to continue from
-  final String stage = args['stage'] as String;
-  for (final ManifestTask task in tasks) {
-    final bool isQualifyingStage = stage == null || task.stage == stage;
-    final bool isQualifyingHost = !(args['match-host-platform'] as bool) || task.isSupportedByHost();
-    if (isQualifyingHost && isQualifyingStage) {
-      taskNames.add(task.name);
-    }
-  }
-}
-
 ArgParser createArgParser(List<String> taskNames) {
   return ArgParser()
     ..addMultiOption(
@@ -293,16 +259,6 @@ ArgParser createArgParser(List<String> taskNames) {
             'The filename may contain a single # character to be replaced by a sequence\n'
             'number if the name already exists.',
     )
-    ..addFlag(
-      'all',
-      abbr: 'a',
-      help: 'Runs all tasks defined in manifest.yaml in alphabetical order.',
-    )
-    ..addOption(
-      'continue-from',
-      abbr: 'c',
-      help: 'With --all or --stage, continue from the given test.',
-    )
     ..addFlag(
       'exit',
       defaultsTo: true,
@@ -352,12 +308,6 @@ ArgParser createArgParser(List<String> taskNames) {
       'service-account-token-file',
       help: '[Flutter infrastructure] Authentication for uploading results.',
     )
-    ..addOption(
-      'stage',
-      abbr: 's',
-      help: 'Name of the stage. Runs all tasks for that stage. The tasks and\n'
-            'their stages are read from manifest.yaml.',
-    )
     ..addFlag(
       'silent',
       help: 'Reduce verbosity slightly.',