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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 e31b29d5cc1..cbc2b2263f2 100644
--- a/src/libsyntax_ext/lib.rs
+++ b/src/libsyntax_ext/lib.rs
@@ -19,7 +19,6 @@
        html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![cfg_attr(not(stage0), deny(warnings))]
 
-#![feature(proc_macro_lib)]
 #![feature(proc_macro_internals)]
 #![feature(rustc_private)]
 #![feature(staged_api)]