I found this command prompt option to uninstall Nvidia NvTelemetry on Nvidia GeForce forums.
open an elevated command prompt and run the following: rundll32 "%PROGRAMFILES%\NVIDIA Corporation\Installer2\InstallerCore\NVI2.DLL",UninstallPackage NvTelemetryContainer
If you want to enable NvTelemetry, just reinstall the driver. Nvidia should make this easier, give us the CHOICE if we want to install telemetry or not when we do a custom install.
Now if we only we could do this with Windows 10 telemetry.