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-rw-r--r--library/core/src/lib.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index 963545a2eb2..03243e31348 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -219,7 +219,6 @@
 #![feature(doc_cfg)]
 #![feature(doc_cfg_hide)]
 #![feature(doc_notable_trait)]
-#![feature(effects)]
 #![feature(exhaustive_patterns)]
 #![feature(extern_types)]
 #![feature(fundamental)]