1 files changed, 0 insertions, 15 deletions
diff --git a/prelude.rb b/prelude.rb
index be249af751..b1e477a3ea 100644
--- a/prelude.rb
+++ b/prelude.rb
@@ -1,18 +1,3 @@
-class << Thread
-  # call-seq:
-  #    Thread.exclusive { block }   -> obj
-  #
-  # Wraps the block in a single, VM-global Mutex.synchronize, returning the
-  # value of the block. A thread executing inside the exclusive section will
-  # only block other threads which also use the Thread.exclusive mechanism.
-  def exclusive(&block) end if false
-  mutex = Mutex.new # :nodoc:
-  define_method(:exclusive) do |&block|
-    warn "Thread.exclusive is deprecated, use Thread::Mutex", uplevel: 1
-    mutex.synchronize(&block)
-  end
-end
-
 class Binding
   # :nodoc:
   def irb