Bug 38234: Remove unused jszip.min.js file

Bug 38234: Remove unused jszip.min.js file

This specific file is not used since Bug 23013 ("Upgrade DataTables in the staff client")

This version is vulnerable and should not be used in the future anyway.

There is a version embedded in our DataTables bundle, which is jszip-3.10.1.

Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>