Drop the unused agama_utils::service module (#2798)

Drop the `agama_utils::service` module because it is not used anymore.

Author: imobachgs

rust/agama-utils/src/lib.rs

@@ -21,9 +21,6 @@
 //! This crate offers a set of utility struct and functions to be used accross
 //! other Agama's crates.
 
-pub mod service;
-pub use service::Service;
-
 pub mod actor;
 pub mod api;
 pub mod dbus;