xslt omit xml delcaration and copy as it is

 <?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="1.0" 

xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output method="xml"   omit-xml-declaration="yes" version="1.0" encoding="UTF-8" indent="yes"/>

  <xsl:template match="@*|node()">

    <xsl:copy>

      <xsl:apply-templates select="@*|node()"/>

    </xsl:copy>

  </xsl:template>

</xsl:stylesheet>