unpin autodoc-traits
we don't pin any other doc dependencies,
and the bug preventing build has already been fixed
# environment, which it is on ReadTheDocs.
# Documentation specific packages
-https://github.com/jupyterhub/autodoc-traits/archive/75885ee24636efbfebfceed1043459715049cd84.zip
+https://github.com/jupyterhub/autodoc-traits/archive/HEAD.zip
myst-parser
pydata-sphinx-theme
sphinx-copybutton
