Remove Smithery installation instructions

Author: tech-sushant

README.md

@@ -288,20 +288,10 @@ Select the “Installed” tab. Click the “Configure MCP Servers” button at
    }
    ```
 
-### Installing via Smithery
-
-To install BrowserStack Test Platform Server for Claude Desktop automatically via [Smithery](https://smithery.ai/server/@browserstack/mcp-server):
-
-```bash
-npx -y @smithery/cli install @browserstack/mcp-server --client claude
-```
-
-
 ### 💡 List of BrowserStack MCP Tools
 
 As of now we support 20 tools.
 
-
 ---
 
 ## 🧾 Test Management