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-rw-r--r--src/libstd/sync/mutex.rs2
1 files changed, 0 insertions, 2 deletions
diff --git a/src/libstd/sync/mutex.rs b/src/libstd/sync/mutex.rs
index e77c4d2e5eb..a4129e315ff 100644
--- a/src/libstd/sync/mutex.rs
+++ b/src/libstd/sync/mutex.rs
@@ -152,8 +152,6 @@ pub struct StaticMutex {
     poison: poison::Flag,
 }
 
-unsafe impl Sync for StaticMutex {}
-
 /// An RAII implementation of a "scoped lock" of a mutex. When this structure is
 /// dropped (falls out of scope), the lock will be unlocked.
 ///