No longer need the patch for Sphinx KeyboardTransform

The issue with KeyboardTransform with dirhtml has been fixed in Sphinx 4.4.0.

docs/conf.py

@@ -22,11 +22,8 @@ from pygments.token import (  # type: ignore
     Comment, Keyword, Literal, Name, Number, String, Whitespace
 )
 from sphinx import addnodes, version_info
-from sphinx.builders.html.transforms import KeyboardTransform
 from sphinx.util.logging import getLogger
 
-KeyboardTransform.builders = ('html', 'dirhtml')  # type: ignore
-
 kitty_src = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 if kitty_src not in sys.path:
     sys.path.insert(0, kitty_src)