Remove old note about pre-1.21 versions

diff --git a/src/doc/src/reference/manifest.md b/src/doc/src/reference/manifest.md
index 117cd373c4be78405943fdf9690072e4c9e5997a..7cae028963cb0d5812de294941456a28e5b9e7fe 100644 (file)
--- a/src/doc/src/reference/manifest.md
+++ b/src/doc/src/reference/manifest.md
@@ -792,8 +792,7 @@ source's original crate is replaced.
 
 More information about overriding dependencies can be found in the [overriding
 dependencies][replace] section of the documentation and [RFC 1969] for the
-technical specification of this feature. (Note that the `[patch]` feature will
-first become available in Rust 1.21, set to be released on 2017-10-12.)
+technical specification of this feature.
 
 [RFC 1969]: https://github.com/rust-lang/rfcs/pull/1969
 [replace]: reference/specifying-dependencies.html#overriding-dependencies