Clean up warnings in Gradle build

spring-web/src/test/java/org/springframework/http/client/HttpComponentsClientHttpRequestFactoryTests.java

@@ -182,6 +182,7 @@ class HttpComponentsClientHttpRequestFactoryTests extends AbstractHttpRequestFac
 		return Stream.of(HttpMethod.GET, HttpMethod.OPTIONS, HttpMethod.TRACE);
 	}
 
+	@SuppressWarnings("deprecation")
 	private RequestConfig retrieveRequestConfig(HttpComponentsClientHttpRequestFactory factory) throws Exception {
 		URI uri = URI.create(baseUrl + "/status/ok");
 		HttpComponentsClientHttpRequest request = (HttpComponentsClientHttpRequest)