Polish " Change info endpoint to be secure and unexposed by default"

See gh-24715

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-secure-webflux/src/test/java/smoketest/secure/webflux/SampleSecureWebFluxApplicationTests.java

@@ -50,11 +50,6 @@ class SampleSecureWebFluxApplicationTests {
 				.isOk();
 	}
 
-	@Test
-	void infoInsecureByDefault() {
-		this.webClient.get().uri("/actuator/info").accept(MediaType.APPLICATION_JSON).exchange().expectStatus().isOk();
-	}
-
 	@Test
 	void otherActuatorsSecureByDefault() {
 		this.webClient.get().uri("/actuator/env").accept(MediaType.APPLICATION_JSON).exchange().expectStatus()