docs(web-dashboard): update local setup guide for Flutter SDK

- Remove specific instructions for enabling web development
- Simplify prerequisite section for Flutter SDK installation

Author: fulleni

src/content/docs/web-dashboard/local-setup.mdx

@@ -10,14 +10,9 @@ This guide will walk you through setting up and running the Flutter News App Web
 <Steps>
 1.  **Prerequisites**
 
-    Before you begin, you must have the Flutter SDK installed and configured for web development. To ensure you are using the most up-to-date and accurate installation instructions, we recommend following the official guide directly from the Flutter team.
+    Before you begin, you must have the Flutter SDK installed on your system. To ensure you are using the most up-to-date and accurate installation instructions, we recommend following the official guide directly from the Flutter team.
 
     -   **Flutter SDK:** Please follow the [Official Flutter Installation Guide](https://flutter.dev/docs/get-started/install) for your specific operating system.
-    
-    Once installed, enable web development support by running:
-    ```bash
-    flutter config --enable-web
-    ```
 
 2.  **Clone the Repository**