remove sphinx-autodoc-typehints (facebook#419)

Summary:
Remove sphinx-autodoc-typehints from the sphinx/source/conf.py file. This was breaking our sphinx build, and is a temporary solution that will remove typehints from our docs.

Pull Request resolved: facebook#419

Reviewed By: lena-kashtelyan

Differential Revision: D24715038

Pulled By: Jakepodell

fbshipit-source-id: 7133ab2b09f6b418488f475bf21497c19daebc3d

sphinx/source/conf.py

@@ -36,7 +36,6 @@
 extensions = [
     "sphinx.ext.napoleon",
     "sphinx.ext.autodoc",
-    "sphinx_autodoc_typehints",
     "sphinx.ext.intersphinx",
     "sphinx.ext.todo",
     "sphinx.ext.coverage",