Revert changes to the reflection example

Author: Davier

examples/reflection/reflection.rs

@@ -2,7 +2,7 @@ use bevy::{
     prelude::*,
     reflect::{
         serde::{ReflectDeserializer, ReflectSerializer},
-        DynamicStruct, FromReflect, TypeRegistry,
+        DynamicStruct, TypeRegistry,
     },
 };
 use serde::de::DeserializeSeed;
@@ -21,8 +21,8 @@ fn main() {
 
 /// Deriving `Reflect` implements the relevant reflection traits. In this case, it implements the
 /// `Reflect` trait and the `Struct` trait `derive(Reflect)` assumes that all fields also implement
-/// Reflect, except the ignored fields which should implement `Default`.
-#[derive(Reflect, FromReflect)]
+/// Reflect.
+#[derive(Reflect)]
 pub struct Foo {
     a: usize,
     nested: Bar,
@@ -32,12 +32,11 @@ pub struct Foo {
 
 /// This `Bar` type is used in the `nested` field on the `Test` type. We must derive `Reflect` here
 /// too (or ignore it)
-#[derive(Reflect, FromReflect)]
+#[derive(Reflect)]
 pub struct Bar {
     b: usize,
 }
 
-#[derive(Default)]
 pub struct NonReflectedValue {
     _a: usize,
 }
@@ -88,9 +87,6 @@ fn setup(type_registry: Res<TypeRegistry>) {
     // DynamicStruct type. "Value types" will be deserialized as themselves.
     let _deserialized_struct = reflect_value.downcast_ref::<DynamicStruct>();
 
-    // A dynamic type can be converted back into a concrete one using the FromReflect trait
-    let _deserialized_concrete_value: Foo = Foo::from_reflect(&*reflect_value).unwrap();
-
     // Reflect has its own `partial_eq` implementation, named `reflect_partial_eq`. This behaves
     // like normal `partial_eq`, but it treats "dynamic" and "non-dynamic" types the same. The
     // `Foo` struct and deserialized `DynamicStruct` are considered equal for this reason: