How to hide IMPORTANT notification wordpress not the regular notifications

Question

i am having a trouble to hiding a notification on wordpress dashboard. I am adding this code to functions.php file of my theme, it hides the plugin or non-important notifications but this one is not hiding. what should be added ?

function remove_core_updates(){ global $wp_version;return(object) array('last_checked'=> time(),'version_checked'=> $wp_version,); } add_filter('pre_site_transient_update_core','remove_core_updates'); //hide updates for WordPress itself add_filter('pre_site_transient_update_plugins','remove_core_updates'); //hide updates for all plugins add_filter('pre_site_transient_update_themes','remove_core_updates'); //hide updates for all themes

I don't want admins too see update also, it is kinda clickable by mistake and would reset the theme. Anyone can help? Tried so many code blocks but they did not even hide non-importants..