diff --git a/lib/timeout.rb b/lib/timeout.rb
index 0dc84b0..9026ad5 100644
--- a/lib/timeout.rb
+++ b/lib/timeout.rb
@@ -120,15 +120,3 @@ def timeout(sec, klass = nil, message = nil)   #:yield: +sec+
 
   module_function :timeout
 end
-
-def timeout(*args, &block)
-  warn "Object##{__method__} is deprecated, use Timeout.timeout instead.", uplevel: 1
-  Timeout.timeout(*args, &block)
-end
-
-# Another name for Timeout::Error, defined for backwards compatibility with
-# earlier versions of timeout.rb.
-TimeoutError = Timeout::Error
-class Object
-  deprecate_constant :TimeoutError
-end