extension-tool: Remove old compatibility code
Since GNOME 44, extension schemas are compiled at install time.
At the time GNOME 46 is released, this will be all supported versions, so start relying on it and drop the old compatibility code.
Since GNOME 44, extension schemas are compiled at install time.
At the time GNOME 46 is released, this will be all supported versions, so start relying on it and drop the old compatibility code.