Impossible to uninstall a broken extension
There is no Uninstall buggy Gnome extension.
"Application Menu" is shown with ERROR status and there is no Uninstall button.
See the attached screenshot:
I did in my Ubuntu Linux
sudo apt remove gnome-shell-extensions
but the extension didn't disappear in https://extensions.gnome.org/local/ list.
So there is really no way to uninstall it.