$field_collection = entity_load_single('field_collection_item', 642);
$field_collection->delete();
По мотивам https://stackoverflow.com/questions/22656603/drupal-7-delete-field-collection-for-node
$field_collection = entity_load_single('field_collection_item', 642);
$field_collection->delete();
По мотивам https://stackoverflow.com/questions/22656603/drupal-7-delete-field-collection-for-node