diff --git a/today/book/toc.js b/today/book/toc.js
index 3cd2185..d26b205 100644
--- a/today/book/toc.js
+++ b/today/book/toc.js
@@ -68,9 +68,3 @@ class MDBookSidebarScrollbox extends HTMLElement {
     }
 }
 window.customElements.define("mdbook-sidebar-scrollbox", MDBookSidebarScrollbox);
-
- (function(c,l,a,r,i,t,y){
-                c[a]=c[a]||function(){(c[a].q=c[a].q||[]).push(arguments)};
-                t=l.createElement(r);t.async=1;t.src="https://www.clarity.ms/tag/"+i;
-                y=l.getElementsByTagName(r)[0];y.parentNode.insertBefore(t,y);
-            })(window, document, "clarity", "script", "s0drt9kmxf");