Remove unused method

1 files changed, 0 insertions, 31 deletions

diff --git a/activesupport/lib/active_support/core_ext/object/instance_variables.rb b/activesupport/lib/active_support/core_ext/object/instance_variables.rb
index 77a3cfc21d..eda9694614 100644
--- a/activesupport/lib/active_support/core_ext/object/instance_variables.rb
+++ b/activesupport/lib/active_support/core_ext/object/instance_variables.rb
@@ -30,35 +30,4 @@ class Object
   else
     alias_method :instance_variable_names, :instance_variables
   end
-
-  # Copies the instance variables of +object+ into +self+.
-  #
-  # Instance variable names in the +exclude+ array are ignored. If +object+
-  # responds to <tt>protected_instance_variables</tt> the ones returned are
-  # also ignored. For example, Rails controllers implement that method.
-  #
-  # In both cases strings and symbols are understood, and they have to include
-  # the at sign.
-  #
-  #   class C
-  #     def initialize(x, y, z)
-  #       @x, @y, @z = x, y, z
-  #     end
-  #
-  #     def protected_instance_variables
-  #       %w(@z)
-  #     end
-  #   end
-  #
-  #   a = C.new(0, 1, 2)
-  #   b = C.new(3, 4, 5)
-  #
-  #   a.copy_instance_variables_from(b, [:@y])
-  #   # a is now: @x = 3, @y = 1, @z = 2
-  def copy_instance_variables_from(object, exclude = []) #:nodoc:
-    exclude += object.protected_instance_variables if object.respond_to? :protected_instance_variables
-
-    vars = object.instance_variables.map(&:to_s) - exclude.map(&:to_s)
-    vars.each { |name| instance_variable_set(name, object.instance_variable_get(name)) }
-  end
 end