chore: remove unused ai sdk dependency

apps/nextjs/package.json

@@ -15,7 +15,6 @@
   },
   "dependencies": {
     "@ai-sdk/openai-compatible": "catalog:",
-    "@ai-sdk/react": "catalog:",
     "@assistant-ui/react": "catalog:",
     "@assistant-ui/react-ai-sdk": "catalog:",
     "@assistant-ui/react-lexical": "catalog:",

pnpm-workspace.yaml

@@ -218,7 +218,6 @@ catalog:
   "@assistant-ui/react": ^0.14.27
   "@assistant-ui/react-ai-sdk": ^1.3.41
   "@assistant-ui/react-markdown": ^0.14.7
-  "@ai-sdk/react": ^4.0.40
   ai: ^7.0.37
   assistant-stream: ^0.3.26
   "@ai-sdk/openai-compatible": 3.0.14