Options no longer needs deep-copy semantics

Follow-up to 23d90a6a187a57fbdf4eeac146993e3b37c3d4d9.

Library/Homebrew/options.rb

@@ -50,9 +50,6 @@ end
 class Options
   include Enumerable
 
-  attr_reader :options
-  protected :options
-
   def self.create(array)
     options = new
     array.each do |e|
@@ -70,11 +67,6 @@ class Options
     @options = Set.new(*args)
   end
 
-  def initialize_copy(other)
-    super
-    @options = other.options.dup
-  end
-
   def each(*args, &block)
     @options.each(*args, &block)
   end

Library/Homebrew/test/test_options.rb

@@ -125,10 +125,4 @@ class OptionsTests < Homebrew::TestCase
     debug = Option.new("-d")
     assert_equal [verbose, debug].sort, Options.create(array).sort
   end
-
-  def test_copies_do_not_share_underlying_collection
-    copy = @options.dup << Option.new("foo")
-    assert_empty @options
-    assert_equal 1, copy.count
-  end
 end