Remove this:

To see what the issues are, remove that code cell and then run tox -e lint -- docs/guides/multiverse-computing-singularity.ipynb. (See https://github.com/Qiskit/documentation?tab=readme-ov-file#execute-notebooks for how to install Tox)

All code should be runnable, such as adding missing imports and defining all variables.

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Also update our CI config to remove this line that ignores the notebook when testing:

Add it here:

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2d2fb9c may be useful inspiration