ah sorry I didn't see this...... yeah it will just throw an airbag light (at the moment you don't have airbags either..) If you're not putting another seat in there, remove pressure sensor and seat belt sensor from their modules. The little square connectors ARE separable, though it may take some work. and make sure you know which ones they go to.
edit: I looked at your post again to make sure.... yeah no it's going back in. lol. just don't, um get in an accident?