diff --git a/etc/extra.inc.php b/etc/extra.inc.php
deleted file mode 100644
index 2f6d91d..0000000
--- a/etc/extra.inc.php
+++ /dev/null
@@ -1,188 +0,0 @@
-<?php
-
-function normalizeUrl($url, $base, $type)
-{
-    $localpath = function ($url, $type) {
-        $purl1 = parse_url($url);
-        $purl2 = parse_url(XOOPS_URL);
-        if (isset($purl1['host']) && isset($purl2['host']) && $purl1['host'] === $purl2['host']) {
-            $url = preg_replace('/^http:/', 'https:', $url);
-        }
-
-        $url = preg_replace('/^https?:\/\/nimg.neuroinf\.jp\/?/', '/', $url);
-        $url = preg_replace('/^\/fmanager\/(view|tmb)\/(.*)(:?\?_t=.*)?$/U', '/modules/fmanager/index.php/\1/\2', $url);
-        $url = preg_replace('/^\/modules\/xoonips\/detail\.php\?((:?item_)?id=.+)&download=.*$/U', '/modules/xoonips/detail.php?\1', $url);
-        $url = preg_replace('/^\/modules\/xoonips\/image\.php\/thumbnail\/(\d+)\/(.*)$/U', '/modules/xoonips/file/\1.png', $url);
-        $url = preg_replace('/^\/modules\/xoonips\/preview\.php\/\d+\/(\d+)\/(.*)$/U', '/modules/xoonips/file/\1.png', $url);
-        $url = preg_replace('/^\/modules\/xoonips\/download\.php\/\d+\/(\d+)\/(.*)$/U', '/modules/xoonips/file/\1/\2', $url);
-        $url = preg_replace('/^\/modules\/xoonips\/download\.php\/([^\/]+)\?file_id=(\d+)$/U', '/modules/xoonips/file/\2/\1', $url);
-        if (preg_match('/^\/modules\/xoonips\/download\.php\?file_id=(\d+)$/U', $url, $matches)) {
-            $fpath = MYDUMPTOOL_OUTPUTDIR.'/public/modules/xoonips/file/'.$matches[1];
-            $found = false;
-            foreach (glob($fpath.'/*') as $fname) {
-                if ('.htaccess' === $fname) {
-                    continue;
-                } else {
-                    $url = '/modules/xoonips/file/'.$matches[1].'/'.urlencode(basename($fname));
-                    $found = true;
-                }
-            }
-            if (false === $found) {
-                echo 'Failed to replace xoonips download url:'.$url.PHP_EOL;
-
-                return false;
-            }
-        }
-        // append
-        if ('videoSrc' === $type) {
-            //$url = preg_replace('/^\/modules\/xoonips\/file\/1459.png$/', '/modules/xoonips/file/1459/benham\'s_top.mp4', $url);
-            //$url = preg_replace('/^\/modules\/xoonips\/file\/1469.png$/', '/modules/xoonips/file/1469/music_notes.mp4', $url);
-        }
-
-        return $url;
-    };
-    if ('' === $url) {
-        return $localpath($base, $type);
-    }
-    $purl = parse_url($url);
-    if (isset($purl['scheme'])) {
-        return $localpath($url, $type);
-    }
-    $pburl = parse_url($base);
-    $path = $pburl['path'];
-    if ('/' == $url[0]) {
-        $path = '';
-    } elseif ('#' !== $url[0] && '?' !== $url[0]) {
-        $path = preg_replace('#/[^/]*$#', '', $path).'/';
-    }
-    $path .= $url;
-    $pattern = ['#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#'];
-    do {
-        $path = preg_replace($pattern, '/', $path, -1, $count);
-    } while (0 < $count);
-
-    return $localpath($pburl['scheme'].'://'.$pburl['host'].$path, $type);
-}
-
-function checkLocalFile($url, $tag)
-{
-    $url2 = preg_replace('/'.preg_quote(XOOPS_URL, '/').'/', '', $url);
-    if (preg_match('/^\//', $url2)) {
-        if (!preg_match('/\/([^\/]+\.(php|html))?(\?.+)?(#.+)?$/i', $url2, $matches)) {
-            $dstFpath = MYDUMPTOOL_OUTPUTDIR.'/public'.urldecode($url2);
-            $srcFpath = XOOPS_ROOT_PATH.urldecode($url2);
-            if (!file_exists($dstFpath)) {
-                if (file_exists($srcFpath)) {
-                    MyDumpTool::makeDirectory('/public'.dirname($url2));
-                    if (!MyDumpTool::fileCopy($srcFpath, $dstFpath)) {
-                        echo 'Error: Failed to copy file: '.$fpath.PHP_EOL;
-
-                        return false;
-                    }
-                } else {
-                    echo 'Error: File not found: '.$fpath.PHP_EOL;
-
-                    return false;
-                }
-            }
-        }
-
-        return $url2;
-    }
-
-    return $url;
-}
-
-function normalizeHtml($text, $path)
-{
-    $text = MyDumpTool::fixHtml($text);
-    $text = preg_replace_callback('/<img ([^>]*)src="(.*)"([^>]*)\/>/Us', function ($matches) use ($path) {
-        $url = htmlspecialchars_decode($matches[2], ENT_QUOTES);
-        $url = normalizeUrl($url, $path, 'imgSrc');
-        $url = checkLocalFile($url, 'imgSrc');
-        if (false === $url) {
-            exit($path.PHP_EOL);
-        }
-
-        return '<img '.$matches[1].'src="'.htmlspecialchars($url, ENT_QUOTES).'"'.$matches[3].'/>';
-    }, $text);
-    $text = preg_replace_callback('/<a ([^>]*)href="([^"]+)"([^>]*)>/Us', function ($matches) use ($path) {
-        $url = htmlspecialchars_decode($matches[2], ENT_QUOTES);
-        if (!preg_match('/^#/', $url)) {
-            $url = normalizeUrl($url, $path, 'aHref');
-            if (false === $url) {
-                exit($path.PHP_EOL);
-            }
-            $url = checkLocalFile($url, 'aHref');
-            if (false === $url) {
-                exit($path.PHP_EOL);
-            }
-        }
-
-        return '<a '.$matches[1].'href="'.htmlspecialchars($url, ENT_QUOTES).'"'.$matches[3].'>';
-    }, $text);
-    $text = preg_replace_callback('/<embed ([^>]*)src="(.*)"([^>]*)\/>/Us', function ($matches) use ($path) {
-        $url = htmlspecialchars_decode($matches[2], ENT_QUOTES);
-        $url = normalizeUrl($url, $path, 'embedSrc');
-        if (false === $url) {
-            exit($path.PHP_EOL);
-        }
-        $url = checkLocalFile($url, 'embedSrc');
-        if (false === $url) {
-            exit($path.PHP_EOL);
-        }
-
-        return '<embed '.$matches[1].'src="'.htmlspecialchars($url, ENT_QUOTES).'"'.$matches[3].'/>';
-    }, $text);
-    $text = preg_replace_callback('/<video ([^>]*)src="(.*)"([^>]*)>/Us', function ($matches) use ($path) {
-        $url = htmlspecialchars_decode($matches[2], ENT_QUOTES);
-        $url = normalizeUrl($url, $path, 'videoSrc');
-        if (false === $url) {
-            exit($path.PHP_EOL);
-        }
-        $url = checkLocalFile($url, 'videoSrc');
-        if (false === $url) {
-            exit($path.PHP_EOL);
-        }
-
-        return '<video '.$matches[1].'src="'.htmlspecialchars($url, ENT_QUOTES).'"'.$matches[3].'>';
-    }, $text);
-    $text = preg_replace('/ lang="([^"]+)"/Us', '', $text);
-    $text = preg_replace('/ xml:lang="([^"]+)"/Us', '', $text);
-    // remove font-family attributes
-    $text = preg_replace_callback('/<span([^>]*?)>((?!<span).*)<\/span>/Us', function ($matches) use ($path) {
-        if ('' === trim($matches[1]) || '' === trim($matches[2]) || '&nbsp;' === trim($matches[2])) {
-            return $matches[2];
-        }
-        $m1 = $matches[1];
-        $m1 = preg_replace_callback('/style="(.*)"/Us', function ($matches2) {
-            $styles1 = array_map('trim', explode(';', htmlspecialchars_decode($matches2[1], ENT_QUOTES)));
-            $styles2 = [];
-            foreach ($styles1 as $style1) {
-                if ('' === $style1) {
-                    continue;
-                }
-                $style = explode(':', $style1);
-                list($key, $value) = array_map('trim', explode(':', $style1));
-                if ('font-family' === $key || 'line-height' === $key || '' === $value || 'color' === $key && 'null' === $value) {
-                    // skip
-                } else {
-                    $styles2[] = $key.':'.$value;
-                }
-            }
-
-            return 0 === count($styles2) ? '' : ('style="'.htmlspecialchars(implode(';', $styles2).';', ENT_QUOTES).'"');
-        }, $m1);
-        if ('' === trim($m1)) {
-            return $matches[2];
-        }
-        if (strpos($m1, 'font-family') > 0) {
-            echo 'trimed span:'.$path.PHP_EOL;
-        }
-
-        return '<span'.$m1.'>'.$matches[2].'</span>';
-    }, $text);
-    $text = MyDumpTool::fixHtml($text);
-
-    return $text;
-}