Update README.md

Author: kartikpersistent

README.md

@@ -80,7 +80,7 @@ You can of course combine all (local, youtube, wikipedia, s3 and gcs) or remove
 ### Chat Modes
 
 By default,all of the chat modes will be available: vector, graph_vector, graph, fulltext, graph_vector_fulltext , entity_vector and global_vector.
-By default,all of the chat modes will be available: vector, graph_vector, graph, fulltext, graph_vector_fulltext , entity_vector and global_vector.
+
 If none of the mode is mentioned in the chat modes variable all modes will be available:
 ```env
 VITE_CHAT_MODES=""