Remove lib.rs for now. Can add it back later with a better name.

If we end up able to abstract some of these apis with a struct like
we have in lib.rs will add back with a better name at that point.

src/main.rs

@@ -25,7 +25,7 @@
 
 use zbus::{ConnectionBuilder, Result};
 
-use steamos_manager::*;
+pub mod manager;
 
 #[async_std::main]
 async fn main() -> Result<()>