multiverse guide has undefined variables

[Eric-Arellano]

Remove this:

documentation/docs/guides/multiverse-computing-singularity.ipynb

Lines 3 to 18 in b5dbc23

	{
	"cell_type": "code",
	"execution_count": null,
	"id": "613c4d93",
	"metadata": {
	"tags": [
	"remove-cell"
	]
	},
	"outputs": [],
	"source": [
	"# This cell is hidden from users\n",
	"# It stops the linter complaining about undefined variables\n",
	"# ruff: noqa: F821"
	]
	},

To see what the issues are, remove that code cell and then run tox -e lint -- docs/guides/multiverse-computing-singularity.ipynb.