Remove obsolete note from Javadoc for BeanDefinitionReader

spring-beans/src/main/java/org/springframework/beans/factory/support/BeanDefinitionReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,10 +29,6 @@ import org.springframework.lang.Nullable;
  * load and register methods for bean definitions, specific to
  * their bean definition format.
  *
- * <p>Note that a bean definition reader does not have to implement
- * this interface. It only serves as a suggestion for bean definition
- * readers that want to follow standard naming conventions.
- *
  * @author Juergen Hoeller
  * @since 1.1
  * @see org.springframework.core.io.Resource