Disable email field on WooCommerce customer account details

You can do it by adding this code to functions.php:

function custom_override_checkout_fields( $fields ) {
    unset($fields['billing']['billing_email']);    
    return $fields;
}
add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields', 1000, 1 );

But it is wrong approach, since WooCommerce uses email to notify user about status of the order.