chore: remove sample integration test

now that we have a real one.

Author: josecelano

tests/integration.rs

@@ -1,13 +1,14 @@
 //! Scaffolding for integration tests.
 //!
+//! Integration tests are used to test the interaction between multiple modules,
+//! multiple running trackers, etc. Tests for one specific module should be in
+//! the corresponding package.
+//!
 //! ```text
 //! cargo test --test integration
 //! ```
 mod servers;
 
-// todo: there is only one test example that was copied from other package.
-// We have to add tests for the whole app.
-
 use torrust_tracker_clock::clock;
 
 /// This code needs to be copied into each crate.

tests/servers/health_check_api.rs

@@ -1,2 +1 @@
 pub mod api;
-pub mod health_check_api;