Remove unused feature gate from `libcore`

diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index ae223941778e75283ac08a7dcc69ab9583fad4ac..d62f6b172580a984086ade252fa6f5bbf322a076 100644 (file)
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -120,7 +120,6 @@
 #![feature(const_slice_len)]
 #![feature(const_str_as_bytes)]
 #![feature(const_str_len)]
-#![cfg_attr(stage0, feature(const_let))]
 #![feature(const_int_rotate)]
 #![feature(const_int_wrapping)]
 #![feature(const_int_sign)]