[libc++] Remove constexpr vector from LLVM 16 release notes

We are shipping it in LLVM 15 via a cherry-pick.

diff --git a/libcxx/docs/ReleaseNotes.rst b/libcxx/docs/ReleaseNotes.rst
index c7df8d7..f5ebc4e 100644 (file)
--- a/libcxx/docs/ReleaseNotes.rst
+++ b/libcxx/docs/ReleaseNotes.rst
@@ -38,8 +38,6 @@ What's New in Libc++ 16.0.0?
 Implemented Papers
 ------------------
 
-- P1004R2 (Making ``std::vector`` constexpr)
-
 Improvements and New Features
 -----------------------------