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-rw-r--r--compiler/rustc_mir_transform/src/lib.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/compiler/rustc_mir_transform/src/lib.rs b/compiler/rustc_mir_transform/src/lib.rs
index 3a515fe8323..6173b446b87 100644
--- a/compiler/rustc_mir_transform/src/lib.rs
+++ b/compiler/rustc_mir_transform/src/lib.rs
@@ -5,7 +5,6 @@
 #![feature(map_try_insert)]
 #![feature(min_specialization)]
 #![feature(never_type)]
-#![feature(once_cell)]
 #![feature(option_get_or_insert_default)]
 #![feature(trusted_step)]
 #![feature(try_blocks)]