remove the old base.dart file

-import 'dart:html' as html;
-
-import 'package:flutter/material.dart';
-import 'package:js/js.dart';
-import 'package:js/js_util.dart';
-import 'package:mobile_scanner/src/enums/barcode_format.dart';
-import 'package:mobile_scanner/src/enums/camera_facing.dart';
-import 'package:mobile_scanner/src/objects/barcode.dart';
-import 'package:mobile_scanner/src/web/media.dart';
-
-class JsLibrary {
-  /// The name of global variable where library is stored.
-  /// Used to properly import the library if [usesRequireJs] flag is true
-  final String contextName;
-  final String url;
-
-  /// If js code checks for 'define' variable.
-  /// E.g. if at the beginning you see code like
-  /// if (typeof define === "function" && define.amd)
-  final bool usesRequireJs;
-
-  const JsLibrary({
-    required this.contextName,
-    required this.url,
-    required this.usesRequireJs,
-  });
-}
-
-abstract class WebBarcodeReaderBase {
-  /// Timer used to capture frames to be analyzed
-  Duration frameInterval = const Duration(milliseconds: 200);
-  final html.DivElement videoContainer;
-
-  WebBarcodeReaderBase({
-    required this.videoContainer,
-  });
-
-  bool get isStarted;
-
-  int get videoWidth;
-  int get videoHeight;
-
-  /// Starts streaming video
-  Future<void> start({
-    required CameraFacing cameraFacing,
-    List<BarcodeFormat>? formats,
-    Duration? detectionTimeout,
-  });
-
-  /// Starts scanning QR codes or barcodes
-  Stream<Barcode?> detectBarcodeContinuously();
-
-  /// Stops scanning QR codes or barcodes
-  Future<void> stopDetectBarcodeContinuously();
-
-  /// Stops streaming video
-  Future<void> stop();
-
-  /// Can enable or disable the flash if available
-  Future<void> toggleTorch({required bool enabled});
-
-  /// Determine whether device has flash
-  Future<bool> hasTorch();
-}
-
-mixin InternalStreamCreation on WebBarcodeReaderBase {
-  /// The video stream.
-  /// Will be initialized later to see which camera needs to be used.
-  html.MediaStream? localMediaStream;
-  final html.VideoElement video = html.VideoElement();
-
-  @override
-  int get videoWidth => video.videoWidth;
-  @override
-  int get videoHeight => video.videoHeight;
-
-  Future<html.MediaStream?> initMediaStream(CameraFacing cameraFacing) async {
-    // Check if browser supports multiple camera's and set if supported
-    final Map? capabilities =
-        html.window.navigator.mediaDevices?.getSupportedConstraints();
-    final Map<String, dynamic> constraints;
-    if (capabilities != null && capabilities['facingMode'] as bool) {
-      constraints = {
-        'video': VideoOptions(
-          facingMode:
-              cameraFacing == CameraFacing.front ? 'user' : 'environment',
-        ),
-      };
-    } else {
-      constraints = {'video': true};
-    }
-    final stream =
-        await html.window.navigator.mediaDevices?.getUserMedia(constraints);
-    return stream;
-  }
-
-  void prepareVideoElement(html.VideoElement videoSource);
-
-  Future<void> attachStreamToVideo(
-    html.MediaStream stream,
-    html.VideoElement videoSource,
-  );
-
-  @override
-  Future<void> stop() async {
-    try {
-      // Stop the camera stream
-      localMediaStream?.getTracks().forEach((track) {
-        if (track.readyState == 'live') {
-          track.stop();
-        }
-      });
-    } catch (e) {
-      debugPrint('Failed to stop stream: $e');
-    }
-    video.srcObject = null;
-    localMediaStream = null;
-    videoContainer.children = [];
-  }
-}
-
-/// Mixin for libraries that don't have built-in torch support
-mixin InternalTorchDetection on InternalStreamCreation {
-  Future<List<String>> getSupportedTorchStates() async {
-    try {
-      final track = localMediaStream?.getVideoTracks();
-      if (track != null) {
-        final imageCapture = ImageCapture(track.first);
-        final photoCapabilities = await promiseToFuture<PhotoCapabilities>(
-          imageCapture.getPhotoCapabilities(),
-        );
-
-        return photoCapabilities.fillLightMode;
-      }
-    } catch (e) {
-      // ImageCapture is not supported by some browsers:
-      // https://developer.mozilla.org/en-US/docs/Web/API/ImageCapture#browser_compatibility
-    }
-    return [];
-  }
-
-  @override
-  Future<bool> hasTorch() async {
-    return (await getSupportedTorchStates()).isNotEmpty;
-  }
-
-  @override
-  Future<void> toggleTorch({required bool enabled}) async {
-    final hasTorch = await this.hasTorch();
-    if (hasTorch) {
-      final track = localMediaStream?.getVideoTracks();
-      await track?.first.applyConstraints({
-        'advanced': [
-          {'torch': enabled},
-        ],
-      });
-    }
-  }
-}
-
-@JS('Promise')
-@staticInterop
-class Promise<T> {}
-
-@JS()
-@anonymous
-@staticInterop
-class PhotoCapabilities {}
-
-extension PhotoCapabilitiesExtension on PhotoCapabilities {
-  @JS('fillLightMode')
-  external List<dynamic>? get _fillLightMode;
-
-  /// Returns an array of available fill light options. Options include auto, off, or flash.
-  List<String> get fillLightMode =>
-      _fillLightMode?.cast<String>() ?? <String>[];
-}
-
-@JS('ImageCapture')
-@staticInterop
-class ImageCapture {
-  /// MediaStreamTrack
-  external factory ImageCapture(dynamic track);
-}
-
-extension ImageCaptureExt on ImageCapture {
-  external Promise<PhotoCapabilities> getPhotoCapabilities();
-}
-
-@JS('Map')
-@staticInterop
-class JsMap {
-  external factory JsMap();
-}
-
-extension JsMapExt on JsMap {
-  external void set(dynamic key, dynamic value);
-  external dynamic get(dynamic key);
-}