undo fix for bug 3393278: should fix some where else, external behaviour of nodels <empty_group> is changed and some customer is affected

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@14598 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/Client.pm

@@ -396,11 +396,6 @@ sub plugin_command {
     unless (@nodes) {
        $req->{emptynoderange} = [1];
     }
-
-    if(@nodes == 0 ) {
-        print "No nodes or noderanges specified\n";
-        return 1;
-     }
   }
   if (@nodes) { $req->{node} = \@nodes; }
   my %unhandled_nodes;