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-rw-r--r--compiler/rustc_mir_dataflow/src/lib.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/compiler/rustc_mir_dataflow/src/lib.rs b/compiler/rustc_mir_dataflow/src/lib.rs
index c1124a533bf..e4c130f0807 100644
--- a/compiler/rustc_mir_dataflow/src/lib.rs
+++ b/compiler/rustc_mir_dataflow/src/lib.rs
@@ -1,6 +1,5 @@
 #![feature(associated_type_defaults)]
 #![feature(box_patterns)]
-#![feature(box_syntax)]
 #![feature(exact_size_is_empty)]
 #![feature(let_else)]
 #![feature(min_specialization)]