I deleted the plugin and the notifications are gone .
As a test, I reinstalled the obsidian-git plugin while leaving it disabled, and I don’t see any notifications emitted. I don’t understand why disabling the plugin didn’t seem to work .
Plugins don’t always fully unload when you disable them, so you may have needed to restart the app after disabling it. (in Obsidian 1.5.11 this problem was fixed for when you enable Restricted Mode, but it might still be an issue when disabling plugins individually.)