mruby-set: remove taint/untaint which are no longer exist.

mrbgems/mruby-set/README.md

@@ -24,8 +24,6 @@ set1 ^ set2
 These methods are not implemented yet:
 
 - freeze
-- taint
-- untaint
 - to_set
 - divide(Set#divide with 2 arity block is not implemented.)
 

mrbgems/mruby-set/mrblib/mrb_set.rb

@@ -51,16 +51,6 @@ class Set
   #   super
   # end
 
-  # def taint
-  #   @hash.taint
-  #   super
-  # end
-
-  # def untaint
-  #   @hash.untaint
-  #   super
-  # end
-
   def size
     @hash.size
   end

mrbgems/mruby-set/test/mrb_set.rb

@@ -593,16 +593,6 @@ assert("Set#divide") do
   # assert_equal(Set, ret.class)
 end
 
-# taint is not implemented yet
-#assert("taintness") do
-#  orig = set = Set[1,2,3]
-#  assert_false set.tainted?
-#  assert_true set.taint.equal?(orig) # assert_same
-#  assert_true set.tainted?
-#  assert_true set.instance_variable_get(:@hash).tainted?
-#  assert_true set.untaint.equal?(orig) # assert_same
-#  assert_false set.tainted?
-#end
 # freeze is not implemented yet
 #assert("freeze") do
 #  orig = set = Set[1,2,3]