Code-Snippets-Functions/Execute a function on a child site/Jetpack/hide-jetpack-promotions.txt

add_filter( 'can_display_jetpack_manage_notice', '__return_false', 20 );
add_filter( 'jetpack_just_in_time_msgs', '__return_false', 20 );
add_filter( 'jetpack_show_promotions', '__return_false', 20 );