fix: Remove XML from test

Signed-off-by: Piotr P. Karwasz <piotr@github.copernik.eu>

Author: ppkarwasz

core/spring-boot/src/test/java/org/springframework/boot/logging/log4j2/Log4J2RuntimeHintsTests.java

@@ -50,8 +50,6 @@ void registersHintsForConfigurationFileParsers() {
 		ReflectionHints reflection = registerHints();
 		// JSON
 		assertThat(reflection.getTypeHint(ObjectMapper.class)).isNotNull();
-		// XML
-		assertThat(reflection.getTypeHint(DocumentBuilderFactory.class)).isNotNull();
 		// YAML
 		assertThat(reflection.getTypeHint(TypeReference.of("com.fasterxml.jackson.dataformat.yaml.YAMLMapper")))
 			.isNotNull();