Revert "Fix DelegateClass block "method redefined" warning"

Author: nobu

lib/delegate.rb

@@ -412,12 +412,10 @@ def __setobj__(obj)  # :nodoc:
     end
     protected_instance_methods.each do |method|
       define_method(method, Delegator.delegating_block(method))
-      alias_method(method, method)
       protected method
     end
     public_instance_methods.each do |method|
       define_method(method, Delegator.delegating_block(method))
-      alias_method(method, method)
     end
   end
   klass.define_singleton_method :public_instance_methods do |all=true|

test/test_delegate.rb

@@ -29,18 +29,6 @@ def test_delegate_class_block
     assert_equal(1, klass.new([1]).foo)
   end
 
-  def test_delegate_class_block_with_override
-    warning = EnvUtil.verbose_warning do
-      klass = DelegateClass(Array) do
-        def first
-          super.inspect
-        end
-      end
-      assert_equal("1", klass.new([1]).first)
-    end
-    assert_empty(warning)
-  end
-
   def test_systemcallerror_eq
     e = SystemCallError.new(0)
     assert((SimpleDelegator.new(e) == e) == (e == SimpleDelegator.new(e)), "[ruby-dev:34808]")