Remove duplicate code for delete all calls.

Author: christophstrobl

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleReactiveMongoRepository.java

@@ -276,14 +276,10 @@ public Mono<Void> deleteAll(Iterable<? extends T> entities) {
 
 		Assert.notNull(entities, "The given Iterable of entities must not be null");
 
-		Collection<?> idCollection = StreamUtils.createStreamFromIterator(entities.iterator()).map(entityInformation::getId)
-				.collect(Collectors.toList());
+		Collection<? extends ID> ids = StreamUtils.createStreamFromIterator(entities.iterator())
+				.map(entityInformation::getId).collect(Collectors.toList());
 
-		Criteria idsInCriteria = where(entityInformation.getIdAttribute()).in(idCollection);
-
-		Query query = new Query(idsInCriteria);
-		getReadPreference().ifPresent(query::withReadPreference);
-		return mongoOperations.remove(query, entityInformation.getJavaType(), entityInformation.getCollectionName()).then();
+		return deleteAllById(ids);
 	}
 
 	@Override