Remove Mathjax path

At the moment the LaTeX rendering in the HMTL output of the docu is broken. Apparently, the mathjax hack introduced with !92 (merged) breaks the LaTeX rendering in the doc.

doc/conf.py

@@ -21,9 +21,6 @@ extensions = [
     'sphinx_autodoc_typehints',
 ]
 
-# set mathjax v3 path according to https://www.sphinx-doc.org/en/master/usage/extensions/math.html
-mathjax_path="https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js?config=TeX-AMS-MML_HTMLorMML"
-
 add_module_names = False
 templates_path = ['_templates']
 source_suffix = '.rst'