My input Excel file has four worksheets; I wanted to delete worksheet #2 and save the spreadsheet. There is no function to delete a worksheet in Spreadsheet::ParseExcel nor SpreadSheet::WriteExcel, as they assume that if you didn't want the sheet, you wouldn't have created it.
#!/usr/bin/perl -w
use strict;
use Spreadsheet::ParseExcel;
use Spreadsheet::ParseExcel::SaveParser;
my ($INFILE,$OUTFILE)=("in.xls","out.xls");
my $oExcel = new Spreadsheet::ParseExcel::SaveParser;
my $oBook = $oExcel->Parse($INFILE);
splice(@{$oBook->{Worksheet}},1,1);
$oBook->{SheetCount}--;
$oExcel->SaveAs($oBook, $OUTFILE);