SmartWave Porto Theme for Magneto 2 includes Magefan Blog Extension out of the box and adds the blog link to the header top links.

If you want to remove the blog from the top links, please follow these steps:

1. Create a new file in your child theme (ThemeVendor/theme-name) directory:

app/design/frontend/ThemeVendor/theme-name/Magefan_Blog/layout/default.xml 

2. Edit the file and put the XML code:

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceBlock name="top_blog_link" remove="true" />
    </body>
</page>

3. Save the changes.

4. Flush Magento cache.

5. Check.