fix: remove reload_serialized_state call not available in main repo

The main repository loads conversation state directly from database,
making the reload_serialized_state method unnecessary and unavailable.

Author: Khaled Abu Baker

crates/chat-cli/src/cli/chat/mod.rs

@@ -542,7 +542,6 @@ impl ChatSession {
             true => {
                 let mut cs = previous_conversation.unwrap();
                 existing_conversation = true;
-                cs.reload_serialized_state(os).await;
 
                 // Extract last exchange (user question + assistant response)
                 let resume_prompt = if let Some((user_msg, assistant_msg)) = cs.history().back() {