remove llama index sidebar item until 0.6.1 release

Author: CalebCourier

docusaurus/sidebars.js

@@ -104,7 +104,6 @@ const sidebars = {
   integrations: [
     // "integrations/azure_openai",
     "integrations/langchain",
-    "integrations/llama_index",
     {
       type: "category",
       label: "Telemetry",