XSLT Issue - Donot need XML Namespace at Element Level. Please Help

Inpput XML:

<MT_Superior_invoice xmlns=’abc.com'

xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:xsd='http://www.w3.org/2001/XMLSchema'

xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>

    <Invoice_recs>

        <Invoice_header>

            <comp_code>8000</comp_code>

            <AP_text>SWS-8VXHR820120624</AP_text>

            <header_text>003000993020120624</header_text>

            <document_dt>20131115</document_dt>

            <posting_dt>20131115</posting_dt>

            <fiscal_year>2013</fiscal_year>

            <document_type>DB</document_type>

            <Reference_no>SWS-8VXHR8</Reference_no>

            <vendor_no>318992</vendor_no>

            <amount>6042.48</amount>

            <invoice_details>

               <Line_num>10</Line_num>

               <gl_account>633001</gl_account>

               <item_text>DWAIN Cochran</item_text>

               <cr_dr_ind>DB</cr_dr_ind>

               <tax_code>I1</tax_code>

               <tax_jurisdiction>WA1030000</tax_jurisdiction>

               <cost_center>801404</cost_center>

               <amount>680.0</amount>

            </invoice_details>

        </Invoice_header>

    </Invoice_recs>

</MT_Superior_invoice>

Output XML: (desired Structure)

<ns0:MT_Superior_invoice xmlns:ns0=abc.com' >

    <Invoice_recs>

        <Invoice_header>

            <comp_code>8000</comp_code>

            <AP_text>SWS-8VXHR820120624</AP_text>

            <header_text>003000993020120624</header_text>

            <document_dt>20131115</document_dt>

            <posting_dt>20131115</posting_dt>

            <fiscal_year>2013</fiscal_year>

            <document_type>DB</document_type>

            <Reference_no>SWS-8VXHR8</Reference_no>

            <vendor_no>318992</vendor_no>

            <amount>6042.48</amount>

            <invoice_details>

               <Line_num>10</Line_num>

               <gl_account>633001</gl_account>

               <item_text>DWAIN Cochran</item_text>

               <cr_dr_ind>DB</cr_dr_ind>

               <tax_code>I1</tax_code>

               <tax_jurisdiction>WA1030000</tax_jurisdiction>

               <cost_center>801404</cost_center>

               <amount>680.0</amount>

            </invoice_details>

        </Invoice_header>

    </Invoice_recs>

</MT_Superior_invoice>

XSLT Used:

<?xml version='1.0' ?>

<xsl:stylesheetversion="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:ns0="abc.com">

    <xsl:templatematch="/">

         <ns0:MT_Superior_invoice>

              <xsl:copy-ofselect="ns0:MT_Superior_invoice/node()"/>

         </ns0:MT_Superior_invoice>

    </xsl:template>

</xsl:stylesheet>

Above XSLT is adding namespace at element level as well ( removing ns0 in Copy-of Select not producing output ).

Need help in modifying above XSLT to produce output shown above( Desired output ).

Thanks for any help and highly appreciated.