Follow-up from #2225739: Remove usage of field_info_instances(), use EntityManager::getFieldDefinitions() instead.
This function no more needed because field has getLabel() method
$ git grep field_views_field_label
core/modules/field/field.views.inc:80:function field_views_field_label($entity_type, $field_name) {
core/modules/field/field.views.inc:185: list($label, $all_labels) = field_views_field_label($entity_type_id, $field_name);
core/modules/file/file.views.inc:510: list($label) = field_views_field_label($entity_type_id, $field_name);
core/modules/image/image.views.inc:45: list($label) = field_views_field_label($entity_type_id, $field_name);
core/modules/taxonomy/taxonomy.views.inc:443: list($label) = field_views_field_label($entity_type_id, $field_name);Only field.views.inc:185 needs some clean-up