Update lib.rs

Author: joseph-gio

crates/bevy_hierarchy/src/lib.rs

@@ -23,19 +23,11 @@ pub mod prelude {
 }
 
 use bevy_app::prelude::*;
-use bevy_ecs::schedule::SystemLabel;
 
 /// The base plugin for handling [`Parent`] and [`Children`] components
 #[derive(Default)]
 pub struct HierarchyPlugin;
 
-/// Label enum for the systems relating to hierarchy upkeep
-#[derive(Debug, Hash, PartialEq, Eq, Clone, SystemLabel)]
-pub enum HierarchySystem {
-    /// Updates [`Parent`] when changes in the hierarchy occur
-    ParentUpdate,
-}
-
 impl Plugin for HierarchyPlugin {
     fn build(&self, app: &mut App) {
         app.register_type::<Children>()