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-rw-r--r--src/libsyntax_ext/lib.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/libsyntax_ext/lib.rs b/src/libsyntax_ext/lib.rs
index 3ded808bb35..4add2261c6c 100644
--- a/src/libsyntax_ext/lib.rs
+++ b/src/libsyntax_ext/lib.rs
@@ -57,7 +57,6 @@ pub fn register_builtin_macros(resolver: &mut dyn syntax::ext::base::Resolver, e
     }
 
     register_bang! {
-        __rust_unstable_column: source_util::expand_column,
         asm: asm::expand_asm,
         assert: assert::expand_assert,
         cfg: cfg::expand_cfg,