zip_delete man page
zip_delete — delete file from zip archive
zip_delete(zip_t *archive, zip_uint64_t index);
The file at position index in the zip archive archive is marked as deleted.
Upon successful completion 0 is returned. Otherwise, -1 is returned and the error code in archive is set to indicate the error.
zip_delete() fails if:
index is not a valid file index in archive.
Dieter Baron <firstname.lastname@example.org> and Thomas Klausner <email@example.com>