Download Ipynb does not exclude excluded input/output

[sebastianjanisch]

Describe the bug

context
When I use the download .ipynb functionality.

expectation
I expected any cells marked as remove-output/remove-input to be excluded from the downloaded notebook.

bug
But instead all cells are part of the downloaded notebook.

problem
This is a problem for us because we have some integration context specific cells that are necessary to run the notebook, but should not be part of the published content.

Reproduce the bug

1. Create notebook with cells tagged as remove-output and remove-input.
2. Build the docs
3. click Download .ipynb
4. verify those cells have not beed removed

List your environment

myst-nb version 1.1.2