Upgrade ruby2ruby to 2.1.1 and remove temp fix

brakeman.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
   s.cert_chain  = ['brakeman-public_cert.pem']
   s.signing_key = gem_priv_key if File.exist? gem_priv_key and $0 =~ /gem\z/
   s.add_dependency "ruby_parser", "~>3.5.0"
-  s.add_dependency "ruby2ruby", "~>2.0.5"
+  s.add_dependency "ruby2ruby", "~>2.1.1"
   s.add_dependency "terminal-table", "~>1.4"
   s.add_dependency "fastercsv", "~>1.5"
   s.add_dependency "highline", "~>1.6.20"

lib/brakeman/processors/output_processor.rb

-#Temporary fix for https://github.com/seattlerb/ruby_parser/issues/154
-class Regexp
-  [:ENC_NONE, :ENC_EUC, :ENC_SJIS, :ENC_UTF8].each do |enc|
-    remove_const enc if const_defined? enc
-  end
-end
-
 require 'ruby2ruby'
 require 'brakeman/util'