Remove duplicate declaration of identifying type for repository.

Author: junghoon-vans

src/main/java/org/springframework/data/elasticsearch/repository/config/ElasticsearchRepositoryConfigExtension.java

@@ -19,6 +19,7 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.List;
 import java.util.Locale;
 
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
@@ -41,6 +42,7 @@
  * @author Mohsin Husen
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Junghoon Ban
  */
 public class ElasticsearchRepositoryConfigExtension extends RepositoryConfigurationExtensionSupport {
 
@@ -106,7 +108,7 @@ protected Collection<Class<? extends Annotation>> getIdentifyingAnnotations() {
 	*/
 	@Override
 	protected Collection<Class<?>> getIdentifyingTypes() {
-		return Arrays.asList(ElasticsearchRepository.class, ElasticsearchRepository.class);
+		return List.of(ElasticsearchRepository.class);
 	}
 
 	/*