docs: revert removal of `E0729`

[rust.git] / compiler / rustc_error_codes / src / error_codes / E0764.md

diff --git a/compiler/rustc_error_codes/src/error_codes/E0764.md b/compiler/rustc_error_codes/src/error_codes/E0764.md
index 0a2e2290e77c2e7ad2cfcd23054a34de130456aa..152627cf6545f5efb4b12f02dea2d4d4c4394371 100644 (file)
--- a/compiler/rustc_error_codes/src/error_codes/E0764.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0764.md
@@ -3,7 +3,6 @@ A mutable reference was used in a constant.
 Erroneous code example:
 
 ```compile_fail,E0764
-#![feature(const_fn)]
 #![feature(const_mut_refs)]
 
 fn main() {
@@ -27,7 +26,6 @@ Remember: you cannot use a function call inside a constant or static. However,
 you can totally use it in constant functions:
 
 ```
-#![feature(const_fn)]
 #![feature(const_mut_refs)]
 
 const fn foo(x: usize) -> usize {