switch-to-configuration-ng: fix clippy errors (#540996)

pkgs/by-name/sw/switch-to-configuration-ng/src/main.rs

@@ -2001,9 +2001,9 @@ won't take effect until you reboot the system.
             // Swap entry disappeared, so turn it off.  Can't use "systemctl stop" here because
             // systemd has lots of alias units that prevent a stop from actually calling "swapoff".
             if *action == Action::DryActivate {
-                eprintln!("would stop swap device: {}", &device);
+                eprintln!("would stop swap device: {}", device);
             } else {
-                eprintln!("stopping swap device: {}", &device);
+                eprintln!("stopping swap device: {}", device);
                 let c_device = std::ffi::CString::new(device.clone())
                     .context("failed to convert device to cstring")?;
                 if unsafe { nix::libc::swapoff(c_device.as_ptr()) } != 0 {