Mark ListenableFuture as deprecated for removal

Closes gh-33808

spring-core/src/test/java/org/springframework/util/concurrent/ListenableFutureTaskTests.java

@@ -33,7 +33,7 @@ import static org.mockito.Mockito.verifyNoInteractions;
  * @author Arjen Poutsma
  * @author Sebastien Deleuze
  */
-@SuppressWarnings({ "deprecation" })
+@SuppressWarnings("removal")
 class ListenableFutureTaskTests {
 
 	@Test

spring-core/src/test/java/org/springframework/util/concurrent/MonoToListenableFutureAdapterTests.java

@@ -30,7 +30,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Rossen Stoyanchev
  */
-@SuppressWarnings("deprecation")
+@SuppressWarnings("removal")
 class MonoToListenableFutureAdapterTests {
 
 	@Test

spring-core/src/test/java/org/springframework/util/concurrent/SettableListenableFutureTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -36,7 +36,7 @@ import static org.mockito.Mockito.verifyNoMoreInteractions;
  * @author Mattias Severson
  * @author Juergen Hoeller
  */
-@SuppressWarnings("deprecation")
+@SuppressWarnings("removal")
 class SettableListenableFutureTests {
 
 	private final SettableListenableFuture<String> settableListenableFuture = new SettableListenableFuture<>();