Clarify the semantic of lite mode

This commit removes the "plain old class" bit of the documentation as
it may be confusing. The gist of it is that it must be a bean but not
annotated with `@Configuration` so the updated sentence states exactly
that.

Closes gh-29957

framework-docs/modules/ROOT/pages/core/beans/java/basic-concepts.adoc

@@ -59,7 +59,7 @@ The preceding `AppConfig` class is equivalent to the following Spring `<beans/>`
 ****
 When `@Bean` methods are declared within classes that are not annotated with
 `@Configuration`, they are referred to as being processed in a "`lite`" mode. Bean methods
-declared in a `@Component` or even in a plain old class are considered to be "`lite`",
+declared on a bean that is not annotated with `@Configuration` are considered to be "`lite`",
 with a different primary purpose of the containing class and a `@Bean` method
 being a sort of bonus there. For example, service components may expose management views
 to the container through an additional `@Bean` method on each applicable component class.