The file resources/ext.wikilambda.edit/components/main-types/ZLabelsBlock.vue was removed in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/926432.

It used some messages that don't seem to be used anywhere now:

1. wikilambda-metadata-labels-table-label
2. wikilambda-metadata-language-column
3. wikilambda-metadata-label-column
4. wikilambda-metadata-aka-column
5. wikilambda-editor-removeitem
6. wikilambda-metadata-fewer-languages
7. wikilambda-metadata-all-languages
8. wikilambda-metadata-hide-languages
9. wikilambda-metadata-show-languages

If there are indeed not used anywhere, they should be deleted from en.json.