Fix unused extension crashing doc-test

Fix an issue where an unused extension, which was not listed as a dependency, was crashing a doc-test, since the package couldn't be found.

Author: AndrewADev

examples/generate_init_py/docs/conf.py

@@ -16,11 +16,6 @@
     "myst_parser",
     "pyo3_stub_gen_ext",  # Our generated extension
     "sphinx.ext.intersphinx",  # For cross-references
-    "sphinxcontrib.katex",
-]
-
-myst_enable_extensions = [
-    "dollarmath",
 ]
 
 # Intersphinx mapping - enables cross-references to external projects