Make AbstractDiscoveryClientOptionalArgs really optional.

docs/src/main/asciidoc/_configprops.adoc

@@ -14,7 +14,6 @@
 |eureka.client.register-with-eureka | `+++true+++` | Indicates whether or not this instance should register its information with eureka server for discovery by others. In some cases, you do not want your instances to be discovered whereas you just want do discover other instances.
 |eureka.server.peer-eureka-nodes-update-interval-ms | `+++0+++` | 
 |eureka.server.peer-eureka-status-refresh-time-interval-ms | `+++0+++` | 
-|ribbon.eureka.enabled | `+++true+++` | Enables the use of Eureka with Ribbon.
 |spring.cloud.loadbalancer.eureka.approximate-zone-from-hostname | `+++false+++` | Used to determine whether we should try to get the `zone` value from host name.
 
 |===

docs/src/main/asciidoc/spring-cloud-netflix.adoc

@@ -307,7 +307,7 @@ The following example shows the dependencies you need to add:
 
 You need not use the raw Netflix `EurekaClient`.
 Also, it is usually more convenient to use it behind a wrapper of some sort.
-Spring Cloud has support for <<spring-cloud-feign, Feign>> (a REST client builder) and <<spring-cloud-ribbon, Spring `RestTemplate`>> through the logical Eureka service identifiers (VIPs) instead of physical URLs.
+Spring Cloud has support for <<spring-cloud-feign, Feign>> (a REST client builder) and https://docs.spring.io/spring-cloud-commons/docs/current/reference/html/#spring-cloud-loadbalancer[Spring Cloud LoadBalancer] through the logical Eureka service identifiers (VIPs) instead of physical URLs.
 
 You can also use the `org.springframework.cloud.client.discovery.DiscoveryClient`, which provides a simple API (not specific to Netflix) for discovery clients, as shown in the following example:
 

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2022 the original author or authors.
+ * Copyright 2013-2023 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.
@@ -257,7 +257,7 @@ public class EurekaClientAutoConfiguration {
 		@Autowired
 		private ApplicationContext context;
 
-		@Autowired
+		@Autowired(required = false)
 		private AbstractDiscoveryClientOptionalArgs<?> optionalArgs;
 
 		@Bean(destroyMethod = "shutdown")
@@ -293,7 +293,7 @@ public class EurekaClientAutoConfiguration {
 		@Autowired
 		private ApplicationContext context;
 
-		@Autowired
+		@Autowired(required = false)
 		private AbstractDiscoveryClientOptionalArgs<?> optionalArgs;
 
 		@Bean(destroyMethod = "shutdown")

spring-cloud-netflix-eureka-client/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -12,12 +12,6 @@
       "description": "Determines whether the EurekaClient instance can be refreshed or not(If disabled none of the Eureka client properties will be refreshable).",
       "type": "java.lang.Boolean"
     },
-    {
-      "defaultValue": true,
-      "name": "ribbon.eureka.enabled",
-      "description": "Enables the use of Eureka with Ribbon.",
-      "type": "java.lang.Boolean"
-    },
     {
       "defaultValue": false,
       "name": "eureka.client.webclient.enabled",

spring-cloud-netflix-eureka-client/src/test/resources/application.yml

@@ -1,9 +1,4 @@
-# for EurekaRibbonClientPropertyOverrideIntegrationTests
-foo3:
-  ribbon:
-    NFLoadBalancerPingClassName: com.netflix.loadbalancer.DummyPing
-    NIWSServerListClassName: com.netflix.loadbalancer.ConfigurationBasedServerList
-    
+
 security:
   basic:
     enabled: false

spring-cloud-netflix-eureka-server/pom.xml

@@ -76,7 +76,7 @@
 			<groupId>org.glassfish.hk2</groupId>
 			<artifactId>spring-bridge</artifactId>
 			<!-- FIXME: 4.0 -->
-			<version>3.0.4</version>
+			<version>3.0.5</version>
 		</dependency>
 		<dependency>
 			<groupId>jakarta.inject</groupId>