diff --git a/examples/states_ui/credits.rs b/examples/states_ui/credits.rs
index 01362ad993..4dd05846d4 100644
--- a/examples/states_ui/credits.rs
+++ b/examples/states_ui/credits.rs
@@ -6,7 +6,11 @@ use amethyst::{
     winit::{MouseButton, VirtualKeyCode},
 };
 
+<<<<<<< Updated upstream
 use crate::{menu::MainMenu, util::delete_hierarchy};
+=======
+use crate::menu::MainMenu;
+>>>>>>> Stashed changes
 
 // A simple 'Screen' State, only capable of loading/showing the prefab ui and registering simple
 // UI interactions (pressing escape or clicking anywhere).
@@ -48,9 +52,12 @@ impl SimpleState for CreditsScreen {
     }
 
     fn on_stop(&mut self, data: StateData<GameData>) {
-        if let Some(handler) = self.ui_handle {
-            delete_hierarchy(handler, data.world).expect("Failed to remove CreditScreen");
+        if let Some(root_entity) = self.ui_handle {
+            data.world
+                .delete_entity(root_entity)
+                .expect("Failed to remove CreditScreen");
         }
+
         self.ui_handle = None;
     }
 }
diff --git a/examples/states_ui/game.rs b/examples/states_ui/game.rs
index 7b91fc1f2d..634f1b8c3f 100644
--- a/examples/states_ui/game.rs
+++ b/examples/states_ui/game.rs
@@ -1,4 +1,8 @@
+<<<<<<< Updated upstream
 use crate::{pause::PauseMenuState, util::delete_hierarchy};
+=======
+use crate::pause::PauseMenuState;
+>>>>>>> Stashed changes
 use amethyst::{
     audio::output::init_output,
     core::Time,
@@ -46,9 +50,12 @@ impl SimpleState for Game {
     }
 
     fn on_stop(&mut self, data: StateData<'_, GameData<'_, '_>>) {
-        if let Some(entity) = self.ui_root {
-            delete_hierarchy(entity, data.world).expect("Failed to remove Game Screen");
+        if let Some(root_entity) = self.ui_root {
+            data.world
+                .delete_entity(root_entity)
+                .expect("Failed to remove Game Screen");
         }
+
         self.ui_root = None;
         self.fps_display = None;
         self.random_text = None;
diff --git a/examples/states_ui/main.rs b/examples/states_ui/main.rs
index 1d7c7e1723..14e053515b 100644
--- a/examples/states_ui/main.rs
+++ b/examples/states_ui/main.rs
@@ -14,7 +14,6 @@ mod events;
 mod game;
 mod menu;
 mod pause;
-mod util;
 mod welcome;
 
 /// Quick overview what you can do when running this example:
diff --git a/examples/states_ui/menu.rs b/examples/states_ui/menu.rs
index 008ebadde6..62041266c9 100644
--- a/examples/states_ui/menu.rs
+++ b/examples/states_ui/menu.rs
@@ -92,9 +92,12 @@ impl SimpleState for MainMenu {
 
     fn on_stop(&mut self, data: StateData<GameData>) {
         // after destroying the current UI, invalidate references as well (makes things cleaner)
-        if let Some(entity) = self.ui_root {
-            delete_hierarchy(entity, data.world).expect("Failed to remove MainMenu");
+        if let Some(root_entity) = self.ui_root {
+            data.world
+                .delete_entity(root_entity)
+                .expect("Failed to remove MainMenu");
         }
+
         self.ui_root = None;
         self.button_start = None;
         self.button_load = None;
diff --git a/examples/states_ui/util.rs b/examples/states_ui/util.rs
deleted file mode 100644
index ff10407ed8..0000000000
--- a/examples/states_ui/util.rs
+++ /dev/null
@@ -1,25 +0,0 @@
-use amethyst::{
-    core::transform::ParentHierarchy,
-    ecs::{
-        error::WrongGeneration,
-        prelude::{Entity, World, WorldExt},
-    },
-};
-
-use std::iter;
-
-/// delete the specified root entity and all of its descendents as specified
-/// by the Parent component and maintained by the ParentHierarchy resource
-// from https://github.com/amethyst/evoli src/utils/hierarchy_util.rs
-pub fn delete_hierarchy(root: Entity, world: &mut World) -> Result<(), WrongGeneration> {
-    let entities = {
-        iter::once(root)
-            .chain(
-                world
-                    .read_resource::<ParentHierarchy>()
-                    .all_children_iter(root),
-            )
-            .collect::<Vec<Entity>>()
-    };
-    world.delete_entities(&entities)
-}
diff --git a/examples/states_ui/welcome.rs b/examples/states_ui/welcome.rs
index 8801412152..6353d68223 100644
--- a/examples/states_ui/welcome.rs
+++ b/examples/states_ui/welcome.rs
@@ -6,7 +6,6 @@ use amethyst::{
     winit::{MouseButton, VirtualKeyCode},
 };
 
-use crate::util::delete_hierarchy;
 
 #[derive(Default, Debug)]
 pub struct WelcomeScreen {
@@ -43,9 +42,12 @@ impl SimpleState for WelcomeScreen {
     }
 
     fn on_stop(&mut self, data: StateData<GameData>) {
-        if let Some(handler) = self.ui_handle {
-            delete_hierarchy(handler, data.world).expect("Failed to remove WelcomeScreen");
+        if let Some(root_entity) = self.ui_handle {
+            data.world
+                .delete_entity(root_entity)
+                .expect("Failed to remove WelcomeScreen");
         }
+
         self.ui_handle = None;
     }
 }