diff --git a/mod/feedback/easy_excel.php b/mod/feedback/easy_excel.php
deleted file mode 100644
index 4c695dfb5cd..00000000000
--- a/mod/feedback/easy_excel.php
+++ /dev/null
@@ -1,256 +0,0 @@
-<?php
-
-/**
-* makes it easier to use the spreadsheet-functions from pear
-*
-* @author Andreas Grabs
-* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
-* @package feedback
-*/
-
-require_once("../../config.php");
-require_once("lib.php");
-
-ini_set('include_path', $CFG->libdir.'/pear' . PATH_SEPARATOR . ini_get('include_path'));
-require_once 'Spreadsheet/Excel/Writer.php';
-
-class EasyWorkbook extends Spreadsheet_Excel_Writer {
-    function &addWorksheet($name = ''){
-        global $CFG;
-
-        $index      = count($this->_worksheets);
-        $sheetname = $this->_sheetname;
-
-        if ($name == '') {
-            $name = $sheetname.($index+1);
-        }
-
-        // Check that sheetname is <= 31 chars (Excel limit before BIFF8).
-        if ($this->_BIFF_version != 0x0600)
-        {
-            if (strlen($name) > 31) {
-                return $this->raiseError("Sheetname $name must be <= 31 chars");
-            }
-        }
-
-        // Check that the worksheet name doesn't already exist: a fatal Excel error.
-        $total_worksheets = count($this->_worksheets);
-        for ($i = 0; $i < $total_worksheets; $i++) {
-            if ($this->_worksheets[$i]->getName() == $name) {
-                 return $this->raiseError("Worksheet '$name' already exists");
-            }
-        }
-
-        $worksheet = new EasyWorksheet($this->_BIFF_version,
-                                          $name, $index,
-                                          $this->_activesheet, $this->_firstsheet,
-                                          $this->_str_total, $this->_str_unique,
-                                          $this->_str_table, $this->_url_format,
-                                          $this->_parser);
-
-        $this->_worksheets[$index] = &$worksheet;     // Store ref for iterator
-        $this->_sheetnames[$index] = $name;             // Store EXTERNSHEET names
-        $this->_parser->setExtSheet($name, $index);  // Register worksheet name with parser
-
-        if(!isset($CFG->latinexcelexport) || !$CFG->latinexcelexport) {
-            $worksheet->setInputEncoding('UTF-16LE');
-            // $worksheet->setInputEncoding('utf-8');
-        }
-        return $worksheet;
-    }
-}
-
-
-class EasyWorksheet extends Spreadsheet_Excel_Writer_Worksheet {
-    var $m_format;
-    var $m_formatbox = array();
-    var $m_workbook;
-
-    function set_workbook(&$workbook) {
-        $this->m_workbook =& $workbook;
-    }
-
-    function write($row, $col, $token)
-    {
-        parent::write($row, $col, $token, $this->m_format);
-    }
-
-    function write_number($row, $col, $num)
-    {
-        parent::writeNumber($row, $col, $num, $this->m_format);
-    }
-
-    function write_string($row, $col, $str)
-    {
-        parent::writeString($row, $col, feedback_convert_to_win($str), $this->m_format);
-    }
-
-    function write_formula($row, $col, $formula)
-    {
-        parent::writeFormula($row, $col, $formula, $this->m_format);
-    }
-
-    function write_url($row, $col, $url, $string = '')
-    {
-        parent::writeUrl($row, $col, $url, $string, $this->m_format);
-    }
-
-    /**
-     *  Setz das aktuelle Format, dass zum Schreiben verwendet wird
-     *  Der Formatstring setzt sich aus den folgenden Buchstaben mit folgender Bedeutung zusammen.
-     *  <f> = Fett
-     *  <k> = kursiv
-     *  <z> = zentriert
-     *  <l> = linksb�ndig
-     *  <r> = rechtsb�ndig
-     *  <vo> = vertikal oben
-     *  <vz> = vertikal zentriert
-     *  <vu> = vertikal unten
-     *  <uX> = unterstrichen X=1-einfach, X=2-doppelt
-     *  <w> = w�hrungsformat
-     *  <pr> = prozentformat
-     *  <ruX> = Rahmen unten X=St�rke
-     *  <roX> = rahmen oben X=St�rke
-     *  <rrX> = rahmen rechts X=St�rke
-     *  <rlX> = rahmen links X=St�rke
-     *  <c:XXX> = Schriftfarbe, XXX kann einen der folgenden Farbwerte enthalten:
-     *      aqua,cyan,black,blue,brown,magenta,fuchsia,gray,
-     *      grey,green,lime,navy,orange,purple,red,silver,white,yellow
-     *      Wichtig: alle Werte m�ssen klein geschrieben werden.
-     *  @param string $formatString
-     *  @param int $size the size of font in pt
-     *  @param boolean $textWrap
-     *  @return void
-     */
-    function setFormat($formatString,$size = 10,$textWrap = true)
-    {
-        //looking for an existing format-signature at the $m_formatbox
-        //this prevents the overflow of formats
-        $signature = $formatString.'_'.$size.'_'.$textWrap;
-        if((count($this->m_formatbox) > 0) AND array_key_exists($signature, $this->m_formatbox)) {
-            $this->m_format = $this->m_formatbox[$signature];
-        }else {
-
-            $this->m_format = &$this->m_workbook->addFormat();
-            if($textWrap)
-            {
-                $this->m_format->setTextWrap();
-            }
-
-            if(preg_match("/<f>/i",$formatString) > 0)
-            {
-                $this->m_format->setBold();
-            }
-
-            if(preg_match("/<k>/i",$formatString) > 0)
-            {
-                $this->m_format->setItalic();
-            }
-
-            if(preg_match("/<z>/i",$formatString) > 0)
-            {
-                $this->m_format->setAlign("center");
-            }
-
-            if(preg_match("/<l>/i",$formatString) > 0)
-            {
-                $this->m_format->setAlign("left");
-            }
-
-            if(preg_match("/<r>/i",$formatString) > 0)
-            {
-                $this->m_format->setAlign("right");
-            }
-
-            if(preg_match("/<vo>/i",$formatString) > 0)
-            {
-                $this->m_format->setAlign("top");
-            }
-
-            if(preg_match("/<vz>/i",$formatString) > 0)
-            {
-                $this->m_format->setAlign("vcenter");
-            }
-
-            if(preg_match("/<vu>/i",$formatString) > 0)
-            {
-                $this->m_format->setAlign("bottom");
-            }
-
-            if(preg_match("/<u\d>/i",$formatString,$treffer) > 0)
-            {
-                $this->m_format->setUnderline(substr($treffer[0],2,1));
-            }
-
-            if(preg_match("/<w>/i",$formatString) > 0)
-            {
-                $this->m_format->setNumFormat("#,##0.00_)�;[Red]-#,##0.00_)�");
-            }
-
-            if(preg_match("/<pr>/i",$formatString) > 0)
-            {
-                $this->m_format->setNumFormat("#,##0.00%");
-            }
-
-            if(preg_match("/<ru\d>/i",$formatString,$treffer) > 0)
-            {
-                $this->m_format->setBottom(substr($treffer[0],3,1));
-            }
-
-            if(preg_match("/<ro\d>/i",$formatString,$treffer) > 0)
-            {
-                $this->m_format->setTop(substr($treffer[0],3,1));
-            }
-
-            if(preg_match("/<rr\d>/i",$formatString,$treffer) > 0)
-            {
-                $this->m_format->setRight(substr($treffer[0],3,1));
-            }
-
-            if(preg_match("/<rl\d>/i",$formatString,$treffer) > 0)
-            {
-                $this->m_format->setLeft(substr($treffer[0],3,1));
-            }
-
-            if(preg_match("/<c\:[^>]+>/",$formatString,$treffer) > 0)
-            {
-                $len = strlen($treffer[0]) - 4; //abzueglich der Zeichen <c:>
-                $this->m_format->setColor(substr($treffer[0],3,$len));
-            }
-
-            $this->m_format->setSize($size);
-
-            //save the format with its signature
-            $this->m_formatbox[$signature] = $this->m_format;
-        }
-    }
-}
-
-function feedback_convert_to_win($text) {
-    global $CFG;
-    static $textlib;
-    static $newwincharset;
-
-    if(!isset($textlib)) {
-        $textlib = textlib_get_instance();
-    }
-
-    if(!isset($newwincharset)) {
-        if(!isset($CFG->latinexcelexport) || !$CFG->latinexcelexport) {
-            $newwincharset = 'UTF-16LE';
-        }else {
-            $newwincharset = get_string('localewincharset', 'langconfig');
-            if($newwincharset == '') {
-                $newwincharset = 'windows-1252';
-            }
-        }
-    }
-
-    //converting <br /> into newline
-    $newtext = str_ireplace('<br />', "\n", $text);
-    $newtext = str_ireplace('<br>', "\n", $newtext);
-
-    return $textlib->convert($newtext, 'utf-8', $newwincharset);
-}
-
-