Remove the service from the service manager, on a command line execute:
installutil /u [/name=<service-name>] <assembly-path>InstallUtil can usually be found here: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
The Rendering Service is a 64-bit application so you need to use the 64-bit InstallUtil with it!
Remove the URL reservation, on a command line execute;
netsh http delete urlacl url=https://+:3334/ netsh http delete urlacl url=https://localhost:3334/
(assuming you used the default reservation as described above)
Delete your SSL certificate port binding:
netsh http delete sslcert hostnameport=[host-name-and-domain]:[port]
Delete the folder containing the service
This is only possible if Service has been correctly stopped in above's steps.