Works like a charm, thank you very much.
The best way — add code to functions.php of child theme:
PHP:add_action( 'wp_loaded', function(){ remove_action( 'redux/page/buddyboss_theme_options/form/before', 'buddyboss_theme_show_theme_option_jaherat_pehla' ); remove_action( 'redux/page/buddyboss_theme_options/form/after', 'buddyboss_theme_show_theme_option_jaherat_pachhi' ); remove_action( 'wp_ajax_buddyboss_theme_options_ajax_save', 'buddyboss_theme_options_avirat_sudharo', 0 ); } );