remove connectivity api as it is still experimental API

flutter/lib/src/integrations/connectivity/web_connectivity_provider.dart

@@ -9,89 +9,25 @@ ConnectivityProvider connectivityProvider() {
 
 class WebConnectivityProvider implements ConnectivityProvider {
 
-  html.NetworkInformation? _networkInformation;
-  String? _oldResult;
-
-  StreamSubscription<html.Event>? _networkInfoSub;
   StreamSubscription<html.Event>? _onOnlineSub;
   StreamSubscription<html.Event>? _onOfflineSub;
 
   @override
   void listen(void Function(String connectivity) onChange) {
-    final supportsNetworkInformation = html.window.navigator.connection != null;
-    if (supportsNetworkInformation) {
-      _networkInformation = html.window.navigator.connection;
-      _oldResult = _networkInformation?.toConnectivityResult();
-
-      _networkInfoSub = _networkInformation?.onChange.listen((_) {
-        final newResult = _networkInformation?.toConnectivityResult();
-        if (newResult != null && _oldResult != newResult) {
-          _oldResult = newResult;
-          onChange(newResult);
-        }
-      });
-    } else {
-      // Fallback to onLine/onOffline API
-      _oldResult = (html.window.navigator.onLine ?? false) ? 'wifi' : 'none';
-      _onOnlineSub = html.window.onOnline.listen((_) {
-        onChange('wifi');
-      });
-      _onOfflineSub = html.window.onOffline.listen((_) {
-        onChange('none');
-      });
-    }
+    _onOnlineSub = html.window.onOnline.listen((_) {
+      onChange('wifi');
+    });
+    _onOfflineSub = html.window.onOffline.listen((_) {
+      onChange('none');
+    });
   }
 
   @override
   void cancel() {
-    _networkInfoSub?.cancel();
-    _networkInfoSub = null;
-
     _onOnlineSub?.cancel();
     _onOnlineSub = null;
 
     _onOfflineSub?.cancel();
     _onOfflineSub = null;
-
-    _oldResult = null;
-    _networkInformation = null;
-  }
-}
-
-// Source: https://github.com/fluttercommunity/plus_plugins/blob/258f7b8b461f6d78028354f95d24014b240a80f0/packages/connectivity_plus/connectivity_plus/lib/src/web/utils/connectivity_result.dart#L8
-extension on html.NetworkInformation {
-  String toConnectivityResult() {
-    if (downlink == 0 && rtt == 0) {
-      return 'none';
-    }
-    if (type != null) {
-      switch (type) {
-        case 'none':
-          return 'none';
-        case 'bluetooth':
-          return 'bluetooth';
-        case 'cellular':
-        case 'mixed':
-        case 'other':
-        case 'unknown':
-          return 'mobile';
-        case 'ethernet':
-          return 'ethernet';
-        default:
-          return 'wifi';
-      }
-    }
-    if (effectiveType != null) {
-      switch (effectiveType) {
-        case 'slow-2g':
-        case '2g':
-        case '3g':
-        case '4g':
-          return 'mobile';
-        default:
-          return 'wifi';
-      }
-    }
-    return 'none';
   }
 }