Removing a Server from the SharePoint farm

1. Login to the servers in the farm as setup account.

2. Start -> SharePoint 2010 Products Configuration wizard

3. Click Next (on the Welcome page of configuration wizard)
 

4. Choose Yes (for restarting the service)

 

5 .Select Disconnect from this server farm (on the Modify server farm Settings page)

 

6. Choose Yes and proceed to remove the server from the SharePoint farm

 

7. The configuration wizard runs and click Finish once the wizard completes