CI: remove deprecated/removed RTD config

bsipocz · bsipocz · commit af0d17afb4c0 · 2023-12-18T22:23:42.000-08:00
diff --git a/.readthedocs.yml b/.readthedocs.yml
@@ -18,7 +18,6 @@ sphinx:
   fail_on_warning: true
 
 python:
-  system_packages: false
   install:
     - method: pip
       path: .
