add_action( 'template_redirect', 'bb_clean_start_page_without_tabs_upsell_related', 1 );
function bb_clean_start_page_without_tabs_upsell_related(){

    // remove product tabs, upsell and related products IF
    // the page is the selected front page by using
    // WP is_front_page function
    if( is_front_page() ) {
        remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_product_data_tabs', 10 ); // Product tabs
        remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_upsell_display', 15 ); // Upsells
        remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 ); // Related products
} }