Woocommerce: How to remove page title from storefront theme homepage

Try this:

add_action( 'wp', 'storefront_remove_title_from_home_homepage_template' );
 
function storefront_remove_title_from_home_homepage_template() {
   remove_action( 'storefront_homepage', 'storefront_homepage_header', 10 );
}

or if you use default template

add_action( 'wp', '_storefront_remove_title_from_home_default_template' );
 
function storefront_remove_title_from_home_default_template() {
   if ( is_front_page() ) remove_action( 'storefront_page', 'storefront_page_header', 10 );
}