Remove library tags, they aren't needed

lib/src/codegen/js_interop.dart

 // Copyright (c) 2015, 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.
 
-library dev_compiler.src.js_interop;
-
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/constant.dart';
 
 bool _isJsLibType(String expectedName, Element e) =>
     e?.name == expectedName && _isJsLib(e.library);
 
 /// Returns true if [e] represents any library from `package:js` or is the
 /// internal `dart:_js_helper` library.
 bool _isJsLib(LibraryElement e) {
@@ skipping 24 matching lines @@
 /// instead of `@JS` from `package:js`).
 bool isJSExportNameAnnotation(DartObjectImpl value) {
   var e = value?.type?.element;
   if (e?.name != 'JSExportName') return false;
   var uri = e.source.uri;
   return uri.scheme == 'dart' && uri.path == '_foreign_helper';
 }
 
 bool isJsPeerInterface(DartObjectImpl value) =>
     value.type.name == 'JsPeerInterface';