Electro v2 - Add SKU in single product summary

functions.php

add_action( 'init', 'ec_child_add_sku_in_single_product_summary', 10 );

function ec_child_add_sku_in_single_product_summary() {
	remove_action( 'woocommerce_single_product_summary',           'electro_template_single_divider',              11 );
	add_action( 'woocommerce_single_product_summary',              'woocommerce_template_single_meta',             11 );
	add_action( 'woocommerce_single_product_summary',              'electro_template_single_divider',              12);
}

style.css

.single-product-wrapper .summary.entry-summary .product_meta .posted_in {
	display: none;
}