String#each_char is not needed for Ruby >= 1.8.7

activesupport/lib/active_support/core_ext/string.rb

@@ -4,7 +4,6 @@ require 'active_support/core_ext/string/multibyte'
 require 'active_support/core_ext/string/starts_ends_with'
 require 'active_support/core_ext/string/inflections'
 require 'active_support/core_ext/string/access'
-require 'active_support/core_ext/string/iterators'
 require 'active_support/core_ext/string/xchar'
 require 'active_support/core_ext/string/behavior'
 require 'active_support/core_ext/string/interpolation'

activesupport/lib/active_support/core_ext/string/iterators.rb

@@ -1,13 +0,0 @@
-unless '1.9'.respond_to?(:each_char)
-  class String
-    # Yields a single-character string for each character in the string.
-    # When $KCODE = 'UTF8', multi-byte characters are yielded appropriately.
-    def each_char
-      require 'strscan' unless defined? ::StringScanner
-      scanner, char = ::StringScanner.new(self), /./mu
-      while c = scanner.scan(char)
-        yield c
-      end
-    end
-  end
-end

activesupport/test/core_ext/string_ext_test.rb

@@ -206,17 +206,6 @@ class StringInflectionsTest < Test::Unit::TestCase
     # And changes the original string:
     assert_equal original, expected
   end
-
-  if RUBY_VERSION < '1.9'
-    def test_each_char_with_utf8_string_when_kcode_is_utf8
-      with_kcode('UTF8') do
-        '€2.99'.each_char do |char|
-          assert_not_equal 1, char.length
-          break
-        end
-      end
-    end
-  end
 end
 
 class StringBehaviourTest < Test::Unit::TestCase