Revert "Build iOS apps using Swift Packages"

packages/flutter_tools/lib/src/ios/mac.dart

@@ -25,7 +25,6 @@ import 'code_signing.dart';
 import 'devices.dart';
 import 'migrations/ios_migrator.dart';
 import 'migrations/project_base_configuration_migration.dart';
-import 'migrations/project_build_location_migration.dart';
 import 'migrations/remove_framework_link_and_embedding_migration.dart';
 import 'migrations/xcode_build_system_migration.dart';
 import 'xcodeproj.dart';
@@ -107,7 +106,6 @@ Future<XcodeBuildResult> buildXcodeProject({
     RemoveFrameworkLinkAndEmbeddingMigration(app.project, globals.logger, globals.xcode, globals.flutterUsage),
     XcodeBuildSystemMigration(app.project, globals.logger),
     ProjectBaseConfigurationMigration(app.project, globals.logger),
-    ProjectBuildLocationMigration(app.project, globals.logger),
   ];
 
   final IOSMigration migration = IOSMigration(migrators);

packages/flutter_tools/lib/src/ios/migrations/ios_migrator.dart

@@ -26,13 +26,6 @@ abstract class IOSMigrator {
   }
 
   @protected
-  String migrateFileContents(String fileContents) {
-    return fileContents;
-  }
-
-  @protected
-  /// Calls [migrateLine] per line, then [migrateFileContents]
-  /// including the line migrations.
   void processFileLines(File file) {
     final List<String> lines = file.readAsLinesSync();
 
@@ -58,16 +51,9 @@ abstract class IOSMigrator {
       newProjectContents.writeln(newProjectLine);
     }
 
-    final String projectContentsWithMigratedLines = newProjectContents.toString();
-    final String projectContentsWithMigratedContents = migrateFileContents(projectContentsWithMigratedLines);
-    if (projectContentsWithMigratedLines != projectContentsWithMigratedContents) {
-      logger.printTrace('Migrating $basename contents');
-      migrationRequired = true;
-    }
-
     if (migrationRequired) {
       logger.printStatus('Upgrading $basename');
-      file.writeAsStringSync(projectContentsWithMigratedContents);
+      file.writeAsStringSync(newProjectContents.toString());
     }
   }
 }

packages/flutter_tools/lib/src/project.dart

@@ -444,11 +444,6 @@ class IosProject extends FlutterProjectPlatform implements XcodeBasedProject {
   @override
   File get xcodeProjectInfoFile => xcodeProject.childFile('project.pbxproj');
 
-  File get xcodeProjectWorkspaceData =>
-    xcodeProject
-    .childDirectory('project.xcworkspace')
-    .childFile('contents.xcworkspacedata');
-
   @override
   Directory get xcodeWorkspace => hostAppRoot.childDirectory('$_hostAppProjectName.xcworkspace');