refactoring: reformat and import sort in logout

src/builtins/logout.rs

@@ -1,6 +1,6 @@
-use system_shutdown::logout;
 use crate::builtins::{Builtin, BuiltinConfig};
 use crate::error::ShellError;
+use system_shutdown::logout;
 
 pub struct Logout;
 
@@ -11,6 +11,5 @@ impl Builtin for Logout {
             Err(error) => eprintln!("Failed to log out: {}", error),
         }
         Ok(())
-
     }
 }