I want to test what happens if someone creates a fresh conda environment, installs jupyterlab, and tries to open one of my notebooks in jupyterlab. When I do this (even in a new conda env), it asks me which of 23 different kernels I've accumulated over the years it should start. I don't want any of that to even appear as an option; I just want what someone would see starting from a fresh install in a fresh home directory. Is there an option I can pass to get this behavior? The CLI help text doesn't tell me anything.
Bonus question: One of the options is "Python 3 (ipykernel)". I don't know where this kernel is coming from. Is it maybe just some sane default that uses whatever python started jupyterlab? Is there some way to get such a default?
