remove working meta

src/fe/mrna/working.html

   <link rel="shortcut icon" href="favicon.ico" type="image/x-icon" sizes="32x32" />
   <link rel="image_src" href="https://event.leecy.org.tw/mrna/images/share.jpg" />
   <link rel="canonical" href="https://event.leecy.org.tw/mrna/" />
-  <meta property="og:title" content="時下正夯的mRNA你了解多少 ?" />
+  <meta property="og:title" content="" />
   <meta property="og:type" content="website" />
   <meta property="og:url" content="" />
-  <meta property="og:image" content="https://event.leecy.org.tw/mrna/images/share.jpg" />
-  <meta property="og:description" content="mRNA疫苗在現代人類面臨健康最大威脅之一的COVID-19疫情大展身手，也推動了更多疾病領域的藥物發展。進入學堂，了解mRNA無限可能 !" />
+  <meta property="og:image" content="" />
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