Remove APIs deprecated for removal in 6.1

This is the first commit that removes deprecated APIs.

Subsequent commits will remove additional deprecated APIs.

See gh-29449

spring-webflux/src/main/java/org/springframework/web/reactive/function/client/ClientResponse.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -57,17 +57,6 @@ public interface ClientResponse {
 	 */
 	HttpStatusCode statusCode();
 
-	/**
-	 * Return the raw status code of this response.
-	 * @return the HTTP status as an integer value
-	 * @since 5.1
-	 * @deprecated as of 6.0, in favor of {@link #statusCode()}
-	 */
-	@Deprecated(since = "6.0", forRemoval = true)
-	default int rawStatusCode() {
-		return statusCode().value();
-	}
-
 	/**
 	 * Return the headers of this response.
 	 */