diff --git a/library/core/src/time.rs b/library/core/src/time.rs
index 179fbabaddeb6..0390bb59a8984 100644
--- a/library/core/src/time.rs
+++ b/library/core/src/time.rs
@@ -617,8 +617,6 @@ impl Duration {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// use std::time::Duration;
     ///
@@ -640,8 +638,6 @@ impl Duration {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// use std::time::Duration;
     ///
@@ -700,8 +696,6 @@ impl Duration {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// use std::time::Duration;
     ///
@@ -758,8 +752,6 @@ impl Duration {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// use std::time::Duration;
     ///
@@ -814,8 +806,6 @@ impl Duration {
     ///
     /// # Examples
     ///
-    /// Basic usage:
-    ///
     /// ```
     /// use std::time::Duration;
     ///