Remove HttpServiceClient annotation

Closes gh-35431

framework-docs/modules/ROOT/pages/integration/rest-clients.adoc

@@ -1195,46 +1195,6 @@ One way to declare HTTP Service groups is via `@ImportHttpServices` annotations
 <1> Manually list interfaces for group "echo"
 <2> Detect interfaces for group "greeting" under a base package
 
-The above lets you declare HTTP Services and groups. As an alternative, you can also
-annotate HTTP interfaces as follows:
-
-[source,java,indent=0,subs="verbatim,quotes"]
-----
-	@HttpServiceClient("echo")
-	public interface EchoServiceA {
-		// ...
-	}
-
-	@HttpServiceClient("echo")
-	public interface EchoServiceB {
-		// ...
-	}
-----
-
-The above requires a dedicated import registrar as follows:
-
-[source,java,indent=0,subs="verbatim,quotes"]
-----
-	public class MyClientHttpServiceRegistrar implements AbstractClientHttpServiceRegistrar { // <1>
-
-		@Override
-		protected void registerHttpServices(GroupRegistry registry, AnnotationMetadata metadata) {
-			findAndRegisterHttpServiceClients(groupRegistry, List.of("org.example.echo")); // <2>
-		}
-	}
-
-	@Configuration
-	@Import(MyClientHttpServiceRegistrar.class) // <3>
-	public class ClientConfig {
-	}
-----
-<1> Extend dedicated `AbstractClientHttpServiceRegistrar`
-<2> Specify base packages where to find client interfaces
-<3> Import the registrar
-
-TIP: `@HttpServiceClient` interfaces are excluded from `@ImportHttpServices` scans, so there
-is no overlap with scans for client interfaces when pointed at the same package.
-
 It is also possible to declare groups programmatically by creating an HTTP Service
 registrar and then importing it: