Hi  ShihabKhan,
There are handled by user itself.
To remove from chrome add the below line style.
<style type="text/css">
    @page
    {
        margin: 0;
    }
</style>
To remove from mozilla add tmoznomarginboxes mozdisallowselectionprint in the head tag.
<script type="text/javascript">
    function PrintPanel() {
        var panel = document.getElementById("<%=pnlContents.ClientID %>");
        var printWindow = window.open('', '', 'height=400,width=800');
        printWindow.document.write('<html moznomarginboxes mozdisallowselectionprint><head><title>DIV Contents</title>');
        printWindow.document.write('</head><body >');
        printWindow.document.write(panel.innerHTML);
        printWindow.document.write('</body></html>');
        // remove title from IE.
        printWindow.document.title = '';
        printWindow.document.close();
        setTimeout(function () {
            printWindow.print();
        }, 500);
        return false;
    }
</script>
For IE you can not control it with javascript. You can remove only the title.