cleanup of old sections

Author: sebastiancrossa

docs.json

@@ -75,16 +75,6 @@
               "judges/submit-feedback",
               "judges/pull-evaluations"
             ]
-          },
-          {
-            "group": "Experiments",
-            "icon": "flask",
-            "pages": ["evaluations/ab-tests", "evaluations/prompt-management"]
-          },
-          {
-            "group": "LLM Gateway",
-            "icon": "network-wired",
-            "pages": ["llm-gateway/introduction"]
           }
         ]
       }