移除已追踪的视频资源，按.gitignore排除

rg-09112127/js/exportCertificate.js

@@ -1,44 +0,0 @@
-/*
-    导出证书
-*/
-
-function showCertificate() {
-    // 获取dom
-    let certificateDom = document.querySelector('.box-certificate');
-    certificateDom.style.display = certificateDom.style.display == "block" ? "none" : "block";
-
-    let certificateNameDom = document.querySelector('.box-certificate-name>span');
-    let classInfo = getClassInfo();
-    certificateNameDom.innerText = classInfo.thank.name;
-
-    let mainVideoDom = document.getElementById("mainVideo");
-    mainVideoDom.pause();
-
-    // 控制按钮展示
-    const buttonDom = document.getElementsByClassName('box-btn')[0];
-    buttonDom.style.display = 'none';
-}
-
-function exportCertificate() {
-    // 获取dom
-    let certificateDom = document.querySelector('.box-certificate');
-    // 创建dom
-    let canvas = document.createElement('canvas');
-    let ctx = canvas.getContext('2d');
-    // 设置dom尺寸
-    canvas.width = certificateDom.offsetWidth;
-    canvas.height = certificateDom.offsetHeight;
-
-    // 调用 html2canvas 方法，创建一个下载链接，将dom转成base64下载
-    html2canvas(certificateDom).then(function (canvas) {
-        let imgData = canvas.toDataURL('image/png');
-        let link = document.createElement('a');
-        link.download = '鸣谢证书.png';
-        link.href = imgData;
-        document.body.appendChild(link);
-        link.click();
-        document.body.removeChild(link);
-
-        certificateDom.style.display = "none";
-    });
-}