Remove unnecessary crate-level comment

crates/data-model/src/lib.rs

@@ -4,14 +4,6 @@
 // SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 // Please see LICENSE files in the repository root for full details.
 
-//!
-//! This crate defines a [`Clock`] trait that can be used to abstract the
-//! way the current time is retrieved. It has two implementation:
-//! [`SystemClock`] that uses the system time and [`MockClock`] which is useful
-//! for testing.
-//!
-//! [`MockClock`]: crate::clock::MockClock
-
 #![allow(clippy::module_name_repetitions)]
 
 use thiserror::Error;