I want to delete unused files and change the code integrity check

I want to delete some unused language files, but I get the 'code integrity check error’
that shows FILE_MISSING

 apps/files_pdfviewer/vendor/pdfjs/web/locale/ach/viewer.properites
 apps/files_pdfviewer/vendor/pdfjs/web/locale/ak/viewer.properites

I tried deleting the files from signature.json, but that created a new error.

 apps/files_pdfviewer/appinfo/signature.json