fix: Remove unused imports and static handler

- Remove unused import of LIST_PROMPTS_HANDLER in command.rs
- Remove unused static PROMPTS_HANDLER in prompts/mod.rs

This change fixes the warnings reported by the compiler and ensures
that only the necessary imports and static handlers are used.

🤖 Assisted by [Amazon Q Developer](https://aws.amazon.com/q/developer)

Author: jsamuel1

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

@@ -22,7 +22,6 @@ use crate::cli::chat::commands::editor::EDITOR_HANDLER;
 use crate::cli::chat::commands::help::HELP_HANDLER;
 use crate::cli::chat::commands::issue::ISSUE_HANDLER;
 use crate::cli::chat::commands::profile::PROFILE_HANDLER;
-use crate::cli::chat::commands::prompts::PROMPTS_HANDLER;
 use crate::cli::chat::commands::quit::QUIT_HANDLER;
 use crate::cli::chat::commands::tools::TOOLS_HANDLER;
 use crate::cli::chat::commands::usage::USAGE_HANDLER;

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

@@ -25,9 +25,6 @@ pub use get::GET_PROMPTS_HANDLER;
 pub use help::HELP_PROMPTS_HANDLER;
 pub use list::LIST_PROMPTS_HANDLER;
 
-/// Static instance of the prompts command handler
-pub static PROMPTS_HANDLER: PromptsCommand = PromptsCommand;
-
 /// Handler for the prompts command
 pub struct PromptsCommand;