Fix readthedocs deprecation

rht · tpike3 · commit ea4b21352f3a · 2023-08-31T06:12:04.000-04:00
See https://blog.readthedocs.com/drop-support-system-packages/
diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -24,4 +24,3 @@ python:
       path: .
       extra_requirements:
         - docs
-  system_packages: true
