Revert "docs: add missing extension for extlinks"

This reverts commit 5f55d20.

Author: 56kyle

docs/conf.py

@@ -16,7 +16,6 @@
 extensions = [
     "sphinx.ext.intersphinx",
     "sphinx.ext.napoleon",
-    "sphinx.ext.extlinks",
     "myst_parser",
     "sphinx_autodoc_typehints",
     "sphinx_copybutton",