The majority of the default dashboard widgets are not necessarily all useful and will turn disaster for your non-tech clients. Well, here in this snippet to remove dashboard widgets.
Paste this to your function.php file in the child theme.
// Create the function to use in the action hook
function wps_remove_dashboard_widgets() {
// Globalize the metaboxes array, this holds all the widgets for wp-admin
global $wp_meta_boxes;
// Main column (left):
// Browser Update Required
unset($wp_meta_boxes['dashboard']['normal']['high']['dashboard_browser_nag']);
// PHP Update Required
unset($wp_meta_boxes['dashboard']['normal']['high']['dashboard_php_nag']);
// At a Glance
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
// Right Now
unset($wp_meta_boxes['dashboard']['normal']['core']['network_dashboard_right_now']);
// Activity
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_activity']);
// Site Health Status
unset($wp_meta_boxes['dashboard']['normal']['core']['health_check_status']);
// Side Column (right):
// WordPress Events and News
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
// Quick Draft, Your Recent Drafts
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
// Remove Welcome panel
remove_action('welcome_panel', 'wp_welcome_panel');
}
// Hoook into the 'wp_dashboard_setup' action to register our function
add_action('wp_dashboard_setup', 'wps_remove_dashboard_widgets' );