Update .readthedocs.yaml

.readthedocs.yaml

@@ -11,11 +11,6 @@ build:
   tools:
     python: "3.11"
 
-# Add Python requirements
-python:
-  extra_requirements:
-    - sphinx_rtd_theme
-
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: source/conf.py