Failed to load module "globalmenu-gtk" after uninstalling gnome-shell

If you get:

Gtk-Message: Failed to load module "globalmenu-gtk"

every time you launch an app, you have left a Gnome Shell module, which is no longer present on your system, in your GTK_MODULES environment variable. In my case, I enabled the Global Menu extension in Gnome Tweak Tool and then uninstalled Gnome Shell. To fix, I rmed the /etc/profile.d/ file and rebooted.