Remove httpclient dependency from sample

Author: marcusdacoregio

spring-session-samples/spring-session-sample-boot-redis-json/spring-session-sample-boot-redis-json.gradle

@@ -11,7 +11,6 @@ dependencies {
 	implementation  "org.webjars:bootstrap"
 	implementation  "org.webjars:html5shiv"
 	implementation  "org.webjars:webjars-locator-core"
-	implementation  "org.apache.httpcomponents:httpclient"
 
 	testImplementation "org.springframework.boot:spring-boot-starter-test"
 	testImplementation "org.assertj:assertj-core"