Phlox

Add this code into function.php of your child theme.

Please make all changes to the child theme files, and do not add the code directly to the theme files, otherwise after updating the theme your fixes will be lost

function.php

// ------------------------------------------------------
//         Groovy Menu plugin integration
// ------------------------------------------------------
if ( ! function_exists( 'gm_child_show_groovy_menu' ) ) {
	function gm_child_show_groovy_menu() {
		if ( function_exists( 'groovy_menu' ) ) {
			groovy_menu();

			// Remove theme legacy top header section
			remove_action( 'auxin_after_inner_body_open', 'auxin_the_top_header_section', 4 );

			// Remove theme legacy main header section
			remove_action( 'auxin_after_inner_body_open', 'auxin_the_main_header_section', 4 );
		}
	}
}

add_action( 'auxin_after_body_open', 'gm_child_show_groovy_menu', 1 );