Upgrade to Gradle nohttp plugin 0.0.4.RELEASE

Also clean up gradle configuration

build.gradle

@@ -23,7 +23,7 @@ buildscript {
 		classpath("io.spring.gradle:dependency-management-plugin:1.0.9.RELEASE")
 		classpath("org.asciidoctor:asciidoctor-gradle-plugin:1.6.1")
 		classpath("org.jfrog.buildinfo:build-info-extractor-gradle:4.9.9")
-		classpath("io.spring.nohttp:nohttp-gradle:0.0.3.RELEASE")
+		classpath("io.spring.nohttp:nohttp-gradle:0.0.4.RELEASE")
 	}
 }
 
@@ -53,16 +53,8 @@ if (project.hasProperty("reactorVersion")) {
 	ext['reactor-bom.version'] = ext.reactorVersion
 }
 
-// NoHttp has to be applied at the root level
-// so that it reads all the root files, including the gradle ones.
 apply plugin: "io.spring.nohttp"
 
-// nohttp requires a valid checkstyle configuration
-checkstyle {
-	configFile = file("${project.rootDir}/src/checkstyle/checkstyle-nohttp.xml")
-	toolVersion = "${checkstyleVersion}"
-}
-
 configure(allprojects) {
 	group = "org.springframework.cloud"
 

src/checkstyle/checkstyle-nohttp.xml

@@ -1,23 +0,0 @@
-<?xml version="1.0"?>
-<!--
-  ~ Copyright 2002-2020 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.
-  ~ You may obtain a copy of the License at
-  ~
-  ~     https://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-
-<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
-        "https://www.puppycrawl.com/dtds/configuration_1_3.dtd">
-
-<module name="Checker">
-    <module name="io.spring.nohttp.checkstyle.check.NoHttpCheck" />
-</module>