cleanup get_labeled_by_id/get_erased_labeled_by_id bounds (#23721)

# Objective

Remove some unnecessary type bounds.

## Testing

`cargo test -p bevy_asset`

Author: yrns

crates/bevy_asset/src/loader.rs

@@ -629,7 +629,7 @@ impl<'a> LoadContext<'a> {
 
     /// Returns the labeled asset given its asset ID if it exists.
     ///
-    /// This can be used to get the asset from its handle since `&Handle` implemented
+    /// This can be used to get the asset from its handle since `&Handle` implements
     /// [`Into<UntypedAssetId>`].
     pub fn get_labeled_by_id(&self, id: impl Into<UntypedAssetId>) -> Option<&ErasedLoadedAsset> {
         let index = self.asset_id_to_asset_index.get(&id.into())?;

crates/bevy_asset/src/transformer.rs

@@ -139,14 +139,10 @@ impl<A: Asset> TransformedAsset<A> {
     ///
     /// This can be used to get the asset from its handle since `&Handle` implements
     /// [`Into<AssetId<B>>`].
-    pub fn get_labeled_by_id<B: Asset, Q>(
+    pub fn get_labeled_by_id<B: Asset>(
         &mut self,
         id: impl Into<AssetId<B>>,
-    ) -> Option<TransformedSubAsset<'_, B>>
-    where
-        CowArc<'static, str>: Borrow<Q>,
-        Q: ?Sized + Hash + Eq,
-    {
+    ) -> Option<TransformedSubAsset<'_, B>> {
         let index = self.asset_id_to_asset_index.get(&id.into().untyped())?;
         let labeled = &mut self.labeled_assets[*index];
         let value = labeled.asset.value.downcast_mut::<B>()?;
@@ -162,14 +158,10 @@ impl<A: Asset> TransformedAsset<A> {
     ///
     /// This can be used to get the asset from its handle since `&UntypedHandle` implements
     /// [`Into<UntypedAssetId>`].
-    pub fn get_erased_labeled_by_id<Q>(
+    pub fn get_erased_labeled_by_id(
         &self,
         id: impl Into<UntypedAssetId>,
-    ) -> Option<&ErasedLoadedAsset>
-    where
-        CowArc<'static, str>: Borrow<Q>,
-        Q: ?Sized + Hash + Eq,
-    {
+    ) -> Option<&ErasedLoadedAsset> {
         let index = self.asset_id_to_asset_index.get(&id.into())?;
         let labeled = &self.labeled_assets[*index];
         Some(&labeled.asset)
@@ -318,14 +310,10 @@ impl<'a, A: Asset> TransformedSubAsset<'a, A> {
     ///
     /// This can be used to get the asset from its handle since `&Handle` implements
     /// [`Into<AssetId<B>>`].
-    pub fn get_labeled_by_id<B: Asset, Q>(
+    pub fn get_labeled_by_id<B: Asset>(
         &mut self,
         id: impl Into<AssetId<B>>,
-    ) -> Option<TransformedSubAsset<'_, B>>
-    where
-        CowArc<'static, str>: Borrow<Q>,
-        Q: ?Sized + Hash + Eq,
-    {
+    ) -> Option<TransformedSubAsset<'_, B>> {
         let index = self.asset_id_to_asset_index.get(&id.into().untyped())?;
         let labeled = &mut self.labeled_assets[*index];
         let value = labeled.asset.value.downcast_mut::<B>()?;
@@ -341,14 +329,10 @@ impl<'a, A: Asset> TransformedSubAsset<'a, A> {
     ///
     /// This can be used to get the asset from its handle since `&UntypedHandle` implements
     /// [`Into<UntypedAssetId>`].
-    pub fn get_erased_labeled_by_id<Q>(
+    pub fn get_erased_labeled_by_id(
         &self,
         id: impl Into<UntypedAssetId>,
-    ) -> Option<&ErasedLoadedAsset>
-    where
-        CowArc<'static, str>: Borrow<Q>,
-        Q: ?Sized + Hash + Eq,
-    {
+    ) -> Option<&ErasedLoadedAsset> {
         let index = self.asset_id_to_asset_index.get(&id.into())?;
         let labeled = &self.labeled_assets[*index];
         Some(&labeled.asset)