Remove duplicate content from "The Spring WebFlux Framework"

Closes gh-31378

Author: wilkinsona

spring-boot-project/spring-boot-docs/src/docs/asciidoc/web/reactive.adoc

@@ -39,28 +39,6 @@ This behavior has been chosen because many Spring developers add `spring-boot-st
 You can still enforce your choice by setting the chosen application type to `SpringApplication.setWebApplicationType(WebApplicationType.REACTIVE)`.
 
 
-"`WebFlux.fn`", the functional variant, separates the routing configuration from the actual handling of the requests, as shown in the following example:
-
-[source,java,indent=0,subs="verbatim"]
-----
-include::{docs-java}/web/reactive/webflux/MyRoutingConfiguration.java[]
-----
-
-[source,java,indent=0,subs="verbatim"]
-----
-include::{docs-java}/web/reactive/webflux/MyUserHandler.java[]
-----
-
-WebFlux is part of the Spring Framework and detailed information is available in its {spring-framework-docs}/web-reactive.html#webflux-fn[reference documentation].
-
-TIP: You can define as many `RouterFunction` beans as you like to modularize the definition of the router.
-Beans can be ordered if you need to apply a precedence.
-
-To get started, add the `spring-boot-starter-webflux` module to your application.
-
-NOTE: Adding both `spring-boot-starter-web` and `spring-boot-starter-webflux` modules in your application results in Spring Boot auto-configuring Spring MVC, not WebFlux.
-This behavior has been chosen because many Spring developers add `spring-boot-starter-webflux` to their Spring MVC application to use the reactive `WebClient`.
-You can still enforce your choice by setting the chosen application type to `SpringApplication.setWebApplicationType(WebApplicationType.REACTIVE)`.
 
 [[web.reactive.webflux.auto-configuration]]
 ==== Spring WebFlux Auto-configuration