Similar to remove product compare blocks from sidebar, you might want to remove wishlist block from sidebar in Magento 2 as well.
In your module or theme, update the layout like following:
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceBlock name="wishlist_sidebar" remove="true" />
</body>
</page>
Refresh the account pages, you will see the wishlist block is remove from sidebar.
Have fun ~
