chore: remove duplicated meta tag (#8718)

Co-authored-by: David Luzar <[email protected]>

excalidraw-app/index.html

@@ -54,12 +54,6 @@
       content="https://excalidraw.com/og-image-3.png"
     />
 
-    <!-- General tags -->
-    <meta
-      name="description"
-      content="Excalidraw is a virtual collaborative whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them."
-    />
-
     <!------------------------------------------------------------------------->
     <!--   to minimize white flash on load when user has dark mode enabled   -->
     <script>