Add missing copyrights and delete empty files (#371)

Author: srujzs

web_generator/bin/gen_interop_bindings.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. 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';
 
 import 'package:args/args.dart';

web_generator/lib/src/cli.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. 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:collection';
 import 'dart:io';
 import 'package:analyzer/dart/analysis/analysis_context_collection.dart';

web_generator/lib/src/dts/config.dart

@@ -1 +1,5 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 final class Config {}

web_generator/lib/src/dts/parser.dart

@@ -1,2 +1,6 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 // TODO(nikeokoronkwo): Implement this function
 dynamic parseDeclarationFiles(Iterable<String> files) {}

web_generator/lib/src/dts/transform.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class DeclarationMap {
   String generate() {
     throw UnimplementedError();

web_generator/lib/src/js/typescript.dart

@@ -1,3 +1,7 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 @TestOn('vm')
 @Tags(['node'])
 library;