fix: remove unused error import from test command

- Remove unused 'error' import from tracing in test.rs
- Fixes nightly Rust toolchain linting failure
- Keeps only used imports: 'info' and 'instrument'

Author: josecelano

src/application/commands/test.rs

@@ -13,7 +13,7 @@
 //! diagnose deployment issues.
 
 use std::net::IpAddr;
-use tracing::{error, info, instrument};
+use tracing::{info, instrument};
 
 use crate::application::steps::{
     // ValidateCloudInitCompletionStep, // Disabled for container testing - see execute() method