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diff --git a/vendor/rails/activesupport/lib/active_support/core_ext/string/multibyte.rb b/vendor/rails/activesupport/lib/active_support/core_ext/string/multibyte.rb
deleted file mode 100644
index a4caa83..0000000
--- a/vendor/rails/activesupport/lib/active_support/core_ext/string/multibyte.rb
+++ /dev/null
@@ -1,81 +0,0 @@
-# encoding: utf-8
-
-module ActiveSupport #:nodoc:
-  module CoreExtensions #:nodoc:
-    module String #:nodoc:
-      # Implements multibyte methods for easier access to multibyte characters in a String instance.
-      module Multibyte
-        unless '1.9'.respond_to?(:force_encoding)
-          # == Multibyte proxy
-          #
-          # +mb_chars+ is a multibyte safe proxy for string methods.
-          #
-          # In Ruby 1.8 and older it creates and returns an instance of the ActiveSupport::Multibyte::Chars class which
-          # encapsulates the original string. A Unicode safe version of all the String methods are defined on this proxy
-          # class. If the proxy class doesn't respond to a certain method, it's forwarded to the encapsuled string.
-          #
-          #   name = 'Claus Müller'
-          #   name.reverse  #=> "rell??M sualC"
-          #   name.length   #=> 13
-          #
-          #   name.mb_chars.reverse.to_s   #=> "rellüM sualC"
-          #   name.mb_chars.length         #=> 12
-          #
-          # In Ruby 1.9 and newer +mb_chars+ returns +self+ because String is (mostly) encoding aware. This means that
-          # it becomes easy to run one version of your code on multiple Ruby versions.
-          #
-          # == Method chaining
-          #
-          # All the methods on the Chars proxy which normally return a string will return a Chars object. This allows
-          # method chaining on the result of any of these methods.
-          #
-          #   name.mb_chars.reverse.length #=> 12
-          #
-          # == Interoperability and configuration
-          #
-          # The Chars object tries to be as interchangeable with String objects as possible: sorting and comparing between
-          # String and Char work like expected. The bang! methods change the internal string representation in the Chars
-          # object. Interoperability problems can be resolved easily with a +to_s+ call.
-          #
-          # For more information about the methods defined on the Chars proxy see ActiveSupport::Multibyte::Chars. For
-          # information about how to change the default Multibyte behaviour see ActiveSupport::Multibyte.
-          def mb_chars
-            if ActiveSupport::Multibyte.proxy_class.wants?(self)
-              ActiveSupport::Multibyte.proxy_class.new(self)
-            else
-              self
-            end
-          end
-          
-          # Returns true if the string has UTF-8 semantics (a String used for purely byte resources is unlikely to have
-          # them), returns false otherwise.
-          def is_utf8?
-            ActiveSupport::Multibyte::Chars.consumes?(self)
-          end
-
-          unless '1.8.7 and later'.respond_to?(:chars)
-            def chars
-              ActiveSupport::Deprecation.warn('String#chars has been deprecated in favor of String#mb_chars.', caller)
-              mb_chars
-            end
-          end
-        else
-          def mb_chars #:nodoc
-            self
-          end
-          
-          def is_utf8? #:nodoc
-            case encoding
-            when Encoding::UTF_8
-              valid_encoding?
-            when Encoding::ASCII_8BIT, Encoding::US_ASCII
-              dup.force_encoding(Encoding::UTF_8).valid_encoding?
-            else
-              false
-            end
-          end
-        end
-      end
-    end
-  end
-end