remove shinyapps.io reference

DESCRIPTION

@@ -11,8 +11,7 @@ Maintainer: David Granjon  <[email protected]>
 Description: 'R' interface to the 'Tabler' HTML template. See more here <https://tabler.io>. 
     'tablerDash' is a light 'Bootstrap 4' dashboard template. There are different 
      layouts available such as a one page dashboard or a multi page template,
-     where the navigation menu is contained in the navigation bar. A fancy example
-     is available at <https://dgranjon.shinyapps.io/shinyMons/>.
+     where the navigation menu is contained in the navigation bar.
 URL: https://rinterface.github.io/tablerDash/, https://github.com/RinteRface/tablerDash/ 
 BugReports: https://github.com/RinteRface/tablerDash/issues
 Imports: shiny, htmltools