update readthedocs

.readthedocs.yaml

@@ -1,24 +1,14 @@
-# .readthedocs.yml
-# Read the Docs configuration file
-# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
-# Required
 version: 2
 
-# Build documentation in the docs/ directory with Sphinx
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
+# Build documentation in the "docs/" directory with Sphinx
 sphinx:
   configuration: docs/source/conf.py
 
-# Build documentation with MkDocs
-#mkdocs:
-#  configuration: mkdocs.yml
-
-# Optionally build your docs in additional formats such as PDF
-formats:
-  - pdf
-
-# Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.10
   install:
     - requirements: docs/requirements.txt