There are other services that rely on nova notifications beyond ceilometer, like searchlight, designate and mistral, there might be others. But you might not be using any of those, so it is a valid request to be able to disable notifications altogether.
There are other services that rely on nova notifications beyond ceilometer, like searchlight, designate and mistral, there might be others. But you might not be using any of those, so it is a valid request to be able to disable notifications altogether.