Remove earlier ignore

Author: stes

docs/source/conf.py

@@ -236,7 +236,6 @@ def get_years(start_year=2021):
 # Right now, only python module types are problematic, in cebra.registry
 nitpick_ignore = [
     ("py:class", "module"),
-    #("py:data", "typing.Union")
 ]
 
 nbsphinx_thumbnails = {