a45e0af97e
The patch [1] introduced the use of Sphinx 6.2.1, which has some
incompatibilities with the current code base.
As we can see in [2], the `no_docstring` argument of
`sphinx.ext.autodoc.Documenter.add_content()` was removed. It was
already not used in our code base, therefore, we can remove its
usage without any issues.
[1] 289feed317
[2] https://www.sphinx-doc.org/en/master/extdev/deprecated.html#dev-deprecated-apis
Change-Id: I65c2bd535fe366933e9aaf842ee9b953c5af375b