After doing a search of all folders in the site for “the_excerpt_rss”, I found a Yoast plugin file that was adding the link to each post item. In the end it was as simple as accessing a field via the dashboard > SEO > advanced and clicking the RSS tab. I emptied the field “Content to put after each post in the feed”, refreshed the feed, and the link was gone. I can’t believe it was as simple as that…
