Use this below code to remove the customized WordPress dashboard and it displays the WordPress dashboard.
Hello,

remove_action(‘wp_before_admin_bar_render’, ‘hsk_talents_hide_admin_bar_links’);
remove_action(‘wp_dashboard_setup’, ‘hsk_remove_dashboard_widgets’);
remove_action( ‘admin_bar_menu’, ‘hsk_talents_admin_bar_logout’, 1 );
remove_action( ‘admin_menu’, ‘hsk_remove_users_admin_notifications’ );
remove_action(‘pre_get_posts’,’hsk_user_roles_upload_access’);
remove_action(‘wp_dashboard_setup’, ‘hsk_user_roles_dashboard_widgets’);
remove_filter( ‘admin_bar_menu’, ‘hsk_talents_change_admin_howdy_text’,25 );
remove_action(‘wp_dashboard_setup’, ‘hsk_remove_activity_dashboard_widget’ );
remove_action(‘publish_post’,’hsk_talent_send_author_email_when_published’);
remove_action(‘after_setup_theme’, ‘hsk_remove_admin_bar’);

Add this above code in functions.php file.