Fix clippy warnings

bevy_asset_loader/examples/progress_tracking.rs

@@ -17,7 +17,7 @@ fn main() {
             DefaultPlugins,
             // track progress during `MyStates::AssetLoading` and continue to `MyStates::Next` when progress is completed
             ProgressPlugin::new(MyStates::AssetLoading).continue_to(MyStates::Next),
-            FrameTimeDiagnosticsPlugin::default(),
+            FrameTimeDiagnosticsPlugin,
         ))
         .add_state::<MyStates>()
         .add_loading_state(LoadingState::new(MyStates::AssetLoading))

bevy_asset_loader/src/dynamic_asset.rs

@@ -109,7 +109,7 @@ impl<State: States> Default for DynamicAssetCollections<State> {
     fn default() -> Self {
         DynamicAssetCollections {
             files: HashMap::default(),
-            _marker: PhantomData::default(),
+            _marker: PhantomData,
         }
     }
 }

bevy_asset_loader/src/loading_state.rs

@@ -486,7 +486,7 @@ impl<S: States> States for InternalLoadingState<S> {
             Self::LoadingDynamicAssetCollections,
             Self::LoadingAssets,
             Self::Finalize,
-            Self::Done(PhantomData::default()),
+            Self::Done(PhantomData),
         ]
         .into_iter()
     }
@@ -755,7 +755,7 @@ where
 {
     fn new() -> Self {
         InternalAssetLoaderPlugin {
-            _state_marker: PhantomData::default(),
+            _state_marker: PhantomData,
         }
     }
 }

bevy_asset_loader/src/loading_state/systems.rs

@@ -173,7 +173,7 @@ pub(crate) fn finish_loading_state<S: States>(
         }
     }
 
-    loading_state.set(InternalLoadingState::Done(PhantomData::default()));
+    loading_state.set(InternalLoadingState::Done(PhantomData));
 }
 
 pub(crate) fn reset_loading_state<S: States>(world: &mut World) {