Remove All Dashboard Widgets

functions​.php

/**
 * Remove All Dashboard Widgets
 */
 
function remove_dashboard_widgets() {
	global $wp_meta_boxes;
	unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments'] );
	unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_primary'] );
	unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary'] );
	remove_meta_box( 'dashboard_activity', 'dashboard', 'normal' );
}
add_action( 'wp_dashboard_setup', 'remove_dashboard_widgets' );