docs: rm duplicate plausible script (#10872)

Cleanup redundant script from documentation

# Which Problems Are Solved

We have removed a redundant script

# How the Problems Are Solved

removed the duplicate script from docusaurus.config.js

docs/docusaurus.config.js

@@ -18,11 +18,6 @@ module.exports = {
       "data-domain": "zitadel.com",
       "data-api": "/docs/proxy/api/event",
     },
-    {
-      src: "/docs/proxy/js/feedback",
-      async: true,
-      defer: true,
-    },
   ],
   customFields: {
     description: