https://www.pcgamer.com/latest-minecraft-update-quietly-scrubs-references-to-notch/

The latest Minecraft Java snapshot release, 19w13a, adds a few new features like a status effect called "Hero of the Village" and an accessibility button on the title screen. It fixes 22 bugs, according to the official patch notes, and adds a number of new quotes to the splash screen, like "Don't worry, be happy!" and "Go to the dentist." It also scrubs two splash screen messages that referenced original Minecraft creator Markus "Notch" Persson.

As spotted by Twitter user decrepitlab, the Minecraft wiki lists the removal of the text "Made by Notch!" and "The Work of Notch!" in the March 27 snapshot. I downloaded the snapshot and compared it to the previous build, 19w12b, from March 21. You can see them side-by-side in the image below, with a search run against both files. The Notch references are indeed gone.