diff --git a/libcxx/docs/ReleaseNotes.rst b/libcxx/docs/ReleaseNotes.rst
--- a/libcxx/docs/ReleaseNotes.rst
+++ b/libcxx/docs/ReleaseNotes.rst
@@ -57,6 +57,7 @@
   If, after updating libc++, you see compiler errors related to missing declarations in
   namespace ``std``, it might be because one of your source files now needs to
   ``#include <algorithm>`` and/or ``#include <chrono>``.
+
 ABI Changes
 -----------
 
diff --git a/libcxx/include/future b/libcxx/include/future
--- a/libcxx/include/future
+++ b/libcxx/include/future
@@ -377,8 +377,6 @@
 #include <thread>
 #include <version>
 
-#include <chrono> // TODO: Remove unused header
-
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif