In Magento 2, you can actually now remove Wishlist and Email products functionality via XML file. Wishlist and Email products block is defined in
vendor/magento/module-catalog/view/frontend/layout/default.xml
and you can remove it by adding a default.xml file to your theme in: <theme_dir>/Magento_Catalog/layout/defaultcalalog_product_view.xml
inside which you remove your block as follows:
Add This :-
<?xml version="1.0"?>
<page layout="1column" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceBlock name="view.addto.wishlist" remove="true"/>
<referenceBlock name="product.info.mailto" remove="true" />
</body>
</page>