Okay so you don’t sell any downloadable products and want to remove this tab from my account ? huh got you.
Its very straight and simple. Go to WooCommerce > Settings > Advanced, You will see My Account Endpoints like screenshot and Downloads in that. Just Remove this input value and  download tab will be removed. Easy ha!.

Woocommerce Remove Downloads tab from My Account page 1

or you need something custom woo-commerce development. We are always here to help. contact us here.