Removed unused items from config API (#20851)

ref 
639be25f1d
ref
f705dda314

- These items are never returned from the API as they've been removed
from the serializer
- The tests also check that they are not present
- They were removed by the referenced commits, which changed how these
things were built

ghost/core/core/server/services/public-config/config.js

@@ -19,9 +19,7 @@ module.exports = function getConfigProperties() {
         emailAnalytics: config.get('emailAnalytics'),
         hostSettings: config.get('hostSettings'),
         tenor: config.get('tenor'),
-        editor: config.get('editor'),
         pintura: config.get('pintura'),
-        adminX: config.get('adminX'),
         signupForm: config.get('signupForm')
     };