How to remove "CYGWIN sshd" service from service list in Windows 7?
Make sure you follow the steps in the CYGWIN FAQ. If you just want to remove the service from the service list, you can follow these steps from ghacks.net - how to remove services in windows.
To remove a service in Windows:
Open up the Command Prompt (aka cmd) as administrator (elevated privileges).
Type in
sc delete "name of service"
and hit enter. To get the proper full name of a service, open the Windows Services management listing and double click on the service. The proper service name is under "Service Name: #service name#"