자동등록방지 캡챠 수정 질문입니다(사노라가노라님 팁으로..)

사노라가노라님 팁으로 mp3가 출력되지 않도록 설정해서
mp3가 더이상 출력되지는 않는데,

저 mp3 부분을 완전히 제거해버리고 싶어서요..
방법좀 알려주시면 감사하겠습니다..

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plugin/kcaptcha/kcaptcha.lib.php






// 캡챠 HTML 코드 출력
function captcha_html($class="captcha")
{
$html .= "\n".'<script>var g5_captcha_url = "'.G5_CAPTCHA_URL.'";</script>';
//$html .= "\n".'<script>var g5_captcha_path = "'.G5_CAPTCHA_PATH.'";</script>';
$html .= "\n".'<script src="'.G5_CAPTCHA_URL.'/kcaptcha.js"></script>';
$html .= "\n".'<fieldset id="captcha" class="'.$class.'">';
$html .= "\n".'<legend>자동등록방지</legend>';
if (G5_IS_MOBILE) $html .= '<audio src="#" id="captcha_audio" controls></audio>';
//$html .= "\n".'<img src="#" alt="" id="captcha_img">';
$html .= "\n".'<img src="javascript:void(0);" alt="" id="captcha_img">';
if (!G5_IS_MOBILE) $html .= "\n".'<button type="button" id="captcha_mp3"><span></span>숫자음성듣기</button>';
$html .= "\n".'<button type="button" id="captcha_reload"><span></span>새로고침</button>';
$html .= '<input type="text" name="captcha_key" id="captcha_key" required class="captcha_box required" size="6" maxlength="6">';
$html .= "\n".'<span id="captcha_info">자동등록방지 숫자를 순서대로 입력하세요.</span>';
$html .= "\n".'</fieldset>';
return $html;
}