remove rx_dart dependency

Author: JulianBissekkou

example/lib/location_indicator_example_page.dart

@@ -5,7 +5,6 @@ import 'package:arcgis_example/main.dart';
 import 'package:arcgis_map_sdk/arcgis_map_sdk.dart';
 import 'package:flutter/material.dart';
 import 'package:geolocator/geolocator.dart';
-import 'package:rxdart/rxdart.dart';
 
 class LocationIndicatorExamplePage extends StatefulWidget {
   const LocationIndicatorExamplePage({super.key});

example/pubspec.lock

@@ -274,14 +274,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
-  rxdart:
-    dependency: "direct main"
-    description:
-      name: rxdart
-      sha256: "5c3004a4a8dbb94bd4bf5412a4def4acdaa12e12f269737a5751369e12d1a962"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.28.0"
   sky_engine:
     dependency: transitive
     description: flutter

example/pubspec.yaml

@@ -11,8 +11,6 @@ environment:
 
 dependencies:
   arcgis_map_sdk: ^0.8.0
-  rxdart: ^0.28.0
-
   cupertino_icons: ^1.0.0
   geolocator: ^10.1.0
   flutter: