remove note about jquery sheet

customize.dist/index.html

@@ -98,9 +98,8 @@
       <p>CryptPad is the <strong>zero knowledge</strong> realtime collaborative editor.
       Encryption carried out in your web browser protects the data from the server, the cloud
       and the NSA. This project uses the <a href="http://ckeditor.com/">CKEditor</a> Visual Editor
-      the <a href="https://github.com/xwiki-contrib/chainpad">ChainPad</a> realtime engine and now
-      <a href="http://visop-dev.com/Project+jQuery.sheet">jQuery.sheet</a> for realtime spreadsheet
-      editing! The secret encryption key is stored in the URL
+      the <a href="https://github.com/xwiki-contrib/chainpad">ChainPad</a> realtime engine. The secret
+      encryption key is stored in the URL
       <a href="https://en.wikipedia.org/wiki/Fragment_identifier">fragment identifier</a> which is
       never sent to the server but is available to javascript so by sharing the URL, you give
       authorization to others who want to participate.</p>