delete file from zip archive
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
zip_delete() was added in libzip 0.6. In libzip 0.10 the
type of index was changed from int