Revert commits for did_you_mean

This reverts commit 4560091b1c99ab33db0d653b9dd2d977fe4676d5.
This reverts commit a6f76122a2395bd914daa0aa04fb5a6ce4e0c045.
This reverts commit e59b18a6379c55f15ccda85c27d6997d44ef5293.
This reverts commit 505dfae05d56d844ea150676edb87850a406d071.

3 files changed, 3 insertions, 110 deletions

diff --git a/test/did_you_mean/core_ext/test_name_error_extension.rb b/test/did_you_mean/core_ext/test_name_error_extension.rb
index 91871cda9a..9dc08dbde3 100644
--- a/test/did_you_mean/core_ext/test_name_error_extension.rb
+++ b/test/did_you_mean/core_ext/test_name_error_extension.rb
@@ -1,7 +1,7 @@
 require_relative '../helper'
 
 class NameErrorExtensionTest < Test::Unit::TestCase
-  SPELL_CHECKERS = DidYouMean.spell_checkers
+  SPELL_CHECKERS = DidYouMean::SPELL_CHECKERS
 
   class TestSpellChecker
     def initialize(*); end
@@ -9,14 +9,13 @@ class NameErrorExtensionTest < Test::Unit::TestCase
   end
 
   def setup
-    @original_spell_checker = DidYouMean.spell_checkers['NameError']
-    DidYouMean.correct_error(NameError, TestSpellChecker)
+    @org, SPELL_CHECKERS['NameError'] = SPELL_CHECKERS['NameError'], TestSpellChecker
 
     @error = assert_raise(NameError){ doesnt_exist }
   end
 
   def teardown
-    DidYouMean.correct_error(NameError, @original_spell_checker)
+    SPELL_CHECKERS['NameError'] = @org
   end
 
   def test_message
diff --git a/test/did_you_mean/helper.rb b/test/did_you_mean/helper.rb
index 7cb7b10282..d8aa41c3d1 100644
--- a/test/did_you_mean/helper.rb
+++ b/test/did_you_mean/helper.rb
@@ -4,10 +4,6 @@ module DidYouMean
   module TestHelper
     class << self
       attr_reader :root
-
-      def ractor_compatible?
-        defined?(Ractor) && RUBY_VERSION >= "3.1.0"
-      end
     end
 
     if File.file?(File.expand_path('../lib/did_you_mean.rb', __dir__))
diff --git a/test/did_you_mean/test_ractor_compatibility.rb b/test/did_you_mean/test_ractor_compatibility.rb
deleted file mode 100644
index 1a9e63997f..0000000000
--- a/test/did_you_mean/test_ractor_compatibility.rb
+++ /dev/null
@@ -1,102 +0,0 @@
-require_relative './helper'
-
-return if not DidYouMean::TestHelper.ractor_compatible?
-
-class RactorCompatibilityTest < Test::Unit::TestCase
-  include DidYouMean::TestHelper
-
-  class ::Book; end
-  class FirstNameError < NameError; end
-
-  def test_class_name_suggestion_works_in_ractor
-    error = Ractor.new {
-              begin
-                Boook
-              rescue NameError => e
-                e.corrections # It is important to call the #corrections method within Ractor.
-                e
-              end
-            }.take
-
-    assert_correction "Book", error.corrections
-  end
-
-  def test_key_name_suggestion_works_in_ractor
-    error = Ractor.new {
-              begin
-                hash = { "foo" => 1, bar: 2 }
-
-                hash.fetch(:bax)
-              rescue KeyError => e
-                e.corrections # It is important to call the #corrections method within Ractor.
-                e
-              end
-            }.take
-
-    assert_correction ":bar", error.corrections
-    assert_match "Did you mean?  :bar", error.to_s
-  end
-
-  def test_method_name_suggestion_works_in_ractor
-    error = Ractor.new {
-              begin
-                self.to__s
-              rescue NoMethodError => e
-                e.corrections # It is important to call the #corrections method within Ractor.
-                e
-              end
-            }.take
-
-    assert_correction :to_s, error.corrections
-    assert_match "Did you mean?  to_s",  error.to_s
-  end
-
-  if defined?(::NoMatchingPatternKeyError)
-    def test_pattern_key_name_suggestion_works_in_ractor
-      error = Ractor.new {
-                begin
-                  eval(<<~RUBY, binding, __FILE__, __LINE__)
-                          hash = {foo: 1, bar: 2, baz: 3}
-                          hash => {fooo:}
-                          fooo = 1 # suppress "unused variable: fooo" warning
-                  RUBY
-                rescue NoMatchingPatternKeyError => e
-                  e.corrections # It is important to call the #corrections method within Ractor.
-                  e
-                end
-              }.take
-
-      assert_correction ":foo", error.corrections
-      assert_match "Did you mean?  :foo", error.to_s
-    end
-  end
-
-  def test_can_raise_other_name_error_in_ractor
-    error = Ractor.new {
-      begin
-        raise FirstNameError, "Other name error"
-      rescue FirstNameError => e
-        e.corrections # It is important to call the #corrections method within Ractor.
-        e
-      end
-    }.take
-
-    assert_not_match(/Did you mean\?/, error.message)
-  end
-
-  def test_variable_name_suggestion_works_in_ractor
-    error = Ractor.new {
-      in_ractor = in_ractor = 1
-
-      begin
-        in_reactor
-      rescue NameError => e
-        e.corrections # It is important to call the #corrections method within Ractor.
-        e
-      end
-    }.take
-
-    assert_correction :in_ractor, error.corrections
-    assert_match "Did you mean?  in_ractor", error.to_s
-  end
-end