fixed clippy errors

src/slimes.rs

@@ -51,13 +51,13 @@ pub fn get_all_slimes() -> Vec<Box<dyn Slime>> {
         Box::new(GpuSlime),
         Box::new(RamSlime),
         Box::new(NetworkSlime),
+        #[cfg(feature = "monitors")]
+        Box::new(MonitorSlime),
+        #[cfg(feature = "audio")]
+        Box::new(AudioSlime),
     ];
 
-    #[cfg(feature = "monitors")]
-    slimes.push(Box::new(MonitorSlime));
 
-    #[cfg(feature = "audio")]
-    slimes.push(Box::new(AudioSlime));
 
     slimes
 }