remove extra class setting

we set quarto-light or quarto-dark at the end of this script,
with the correct setting. so there is no need to set it here.

Author: gordonwoodhull

src/resources/formats/html/templates/quarto-html-before-body.ejs

@@ -21,9 +21,6 @@
       }
     }
 
-    toggleBodyColorPrimary();
-
-
     const toggleColorMode = (alternate) => {
       // Switch the stylesheets
       const primaryStylesheets = window.document.querySelectorAll('link.quarto-color-scheme:not(.quarto-color-alternate)');