docs: remove colon from time header

notriddle · notriddle · commit 2cdec46275a9 · 2023-01-28T16:07:34.000-07:00
It's not used anywhere else; the inconsistency is weird.
diff --git a/library/std/src/time.rs b/library/std/src/time.rs
@@ -1,6 +1,6 @@
 //! Temporal quantification.
 //!
-//! # Examples:
+//! # Examples
 //!
 //! There are multiple ways to create a new [`Duration`]:
 //!
