Remove DeclarationTVAPCGMapping title from configuration page

- Remove the redundant title section from the PCG Mapping tab
- Clean up the configuration page interface further
- Improve user experience with less redundant text

admin/setup_mvp.php

@@ -138,7 +138,6 @@ print '<input type="hidden" name="action" value="update_mappings">';
 print '<input type="hidden" name="token" value="' . newToken() . '">';
 
 print '<div class="fiche">';
-print '<div class="titre">' . $langs->trans("DeclarationTVAPCGMapping") . '</div>';
 
 // Group CA-3 lines by section
 $lines_by_section = array();