Update .readthedocs.yml

Author: rieder

.readthedocs.yml

@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3"
+    python: "3.7"
 sphinx:
   configuration: doc/conf.py
 
@@ -22,6 +22,5 @@ formats: []
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.7
   install:
     - requirements: doc/requirements.txt