zip_delete —
delete file from zip archive
#include <zip.h>
int
  
  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:
  - [ZIP_ER_INVAL]
- index is not a valid file index in
      archive.
zip_delete() was added in libzip 0.6. In libzip 0.10 the
  type of index was changed from int
  to zip_uint64_t.