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-rw-r--r--src/libsyntax/lib.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 36488b3a69f..a6145d5dcb3 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -14,7 +14,6 @@
 #![feature(nll)]
 #![feature(rustc_attrs)]
 #![feature(rustc_diagnostic_macros)]
-#![feature(slice_sort_by_cached_key)]
 #![feature(step_trait)]
 #![feature(try_trait)]
 #![feature(unicode_internals)]