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diff --git a/vendor/rails/activesupport/lib/active_support/core_ext/rexml.rb b/vendor/rails/activesupport/lib/active_support/core_ext/rexml.rb
deleted file mode 100644
index b4891a9..0000000
--- a/vendor/rails/activesupport/lib/active_support/core_ext/rexml.rb
+++ /dev/null
@@ -1,41 +0,0 @@
-# Fixes the rexml vulnerability disclosed at:
-# http://www.ruby-lang.org/en/news/2008/08/23/dos-vulnerability-in-rexml/
-# This fix is identical to rexml-expansion-fix version 1.0.1
-require 'rexml/rexml'
-
-# Earlier versions of rexml defined REXML::Version, newer ones REXML::VERSION
-unless (defined?(REXML::VERSION) ? REXML::VERSION : REXML::Version) > "3.1.7.2"
-  require 'rexml/document'
-
-  # REXML in 1.8.7 has the patch but didn't update Version from 3.1.7.2.
-  unless REXML::Document.respond_to?(:entity_expansion_limit=)
-    require 'rexml/entity'
-
-    module REXML
-      class Entity < Child
-        undef_method :unnormalized
-        def unnormalized
-          document.record_entity_expansion! if document
-          v = value()
-          return nil if v.nil?
-          @unnormalized = Text::unnormalize(v, parent)
-          @unnormalized
-        end
-      end
-      class Document < Element
-        @@entity_expansion_limit = 10_000
-        def self.entity_expansion_limit= val
-          @@entity_expansion_limit = val
-        end
-
-        def record_entity_expansion!
-          @number_of_expansions ||= 0
-          @number_of_expansions += 1
-          if @number_of_expansions > @@entity_expansion_limit
-            raise "Number of entity expansions exceeded, processing aborted."
-          end
-        end
-      end
-    end
-  end
-end