hide admin notices in WordPress.

hide-admin-notices.php

add_action('admin_enqueue_scripts', 'ds_admin_theme_style');
add_action('login_enqueue_scripts', 'ds_admin_theme_style');
function ds_admin_theme_style() {
	if (!current_user_can( 'manage_options' )) {
		echo '<style>.update-nag, .updated, .error, .is-dismissible { display: none; }</style>';
	}
}

/* Hide wp-admin side notice with CSS */

add_action('admin_head', 'custom_css_on_admin_dashboard');
function custom_css_on_admin_dashboard() {
  echo '<style>
    .notice, .dokan-license-notice, .update-nag, .updated, .error, .is-dismissible, .elementor-message {
      display: none !important;
    } 
  </style>';
}