Upgrade readthedocs config

https://blog.readthedocs.com/drop-support-system-packages/

Author: ConorMacBride

.readthedocs.yaml

@@ -6,7 +6,6 @@ build:
     python: "3.11"
 
 python:
-  system_packages: false
   install:
     - method: pip
       path: .