Documentation entries are duplicated

[InCogNiTo124]

Bug description

Some methods are duplicated in the api documentation at https://jupyterhub-dockerspawner.readthedocs.io/en/latest/api/index.html

Expected behaviour

The documentation should show only distinct entries

Actual behaviour

Sometimes there are two equal entries in a row. Never more than two, though.

How to reproduce

1. Go to https://jupyterhub-dockerspawner.readthedocs.io/en/latest/api/index.html
2. The first entry allowed_images is already duplicated
3. Scroll and look at other duplicated entries

Your personal set up

Not Applicable

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