Remove deprecated WebFlux APIs

See gh-33809

spring-test/src/main/java/org/springframework/mock/web/reactive/function/server/MockServerRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2025 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.
@@ -127,12 +127,6 @@ public final class MockServerRequest implements ServerRequest {
 		return this.method;
 	}
 
-	@Override
-	@Deprecated
-	public String methodName() {
-		return this.method.name();
-	}
-
 	@Override
 	public URI uri() {
 		return this.uri;