fix: remove unused imports and dead code

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/main.rs

@@ -122,10 +122,7 @@ fn main() -> Result<(), Error> {
         mode = KeepModes::Info;
     } else if args.mode.status {
         mode = KeepModes::Status;
-    } else if args.mode.server.is_some() {
-        mode = KeepModes::Server;
-    } else if settings.get_server_address(&args, &config).is_some() && args.mode.server.is_none() {
-        // If server is configured in config file but not specified via CLI
+    } else if args.mode.server {
         mode = KeepModes::Server;
     }