试图修复md转html显示问题

docutranslate/template/markdown.html

@@ -26,11 +26,6 @@
         securityLevel: 'loose',
         startOnLoad: true
     });
-    let observer = new MutationObserver(mutations => {
-        for (let mutation of mutations) {
-            mutation.target.style.visibility = "visible";
-        }
-    });
     // ***** 修改这里的选择器 *****
     document.querySelectorAll("pre.mermaid").forEach(item => {
         observer.observe(item, {