remove unused Data::Dumper usages

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

PVE/Storage/LunCmd/Iet.pm

@@ -15,8 +15,8 @@ package PVE::Storage::LunCmd::Iet;
 
 use strict;
 use warnings;
+
 use PVE::Tools qw(run_command file_read_firstline trim dir_glob_regex dir_glob_foreach);
-use Data::Dumper;
 
 sub get_base;