Thank you for sending question and the contribute from Viorel. The “Ready”, “Add to Source Control” area is the main Status Bar in Visual Studio. You can hide this status bar by going to Menu bar > Tools > Options. Find the environment section, uncheck the Show status bar.
However, this status bar shouldn't be hidden since it the important part of UI. You can check for more details by using the link below:
Customize menus and toolbars - Visual Studio (Windows) | Microsoft Learn
Hope this helps! If my answer was helpful - kindly follow the instructions here so others with the same problem can benefit as well.