Remove deprecated `Module#reachable?` method

activesupport/CHANGELOG.md

+*   Remove deprecated `Module#reachable?` method.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `#acronym_regex` method from `Inflections`.
 
     *Rafael Mendonça França*

activesupport/lib/active_support/core_ext/module.rb

@@ -3,7 +3,6 @@
 require "active_support/core_ext/module/aliasing"
 require "active_support/core_ext/module/introspection"
 require "active_support/core_ext/module/anonymous"
-require "active_support/core_ext/module/reachable"
 require "active_support/core_ext/module/attribute_accessors"
 require "active_support/core_ext/module/attribute_accessors_per_thread"
 require "active_support/core_ext/module/attr_internal"

activesupport/lib/active_support/core_ext/module/reachable.rb

@@ -3,9 +3,4 @@
 require "active_support/core_ext/module/anonymous"
 require "active_support/core_ext/string/inflections"
 
-class Module
-  def reachable? #:nodoc:
-    !anonymous? && name.safe_constantize.equal?(self)
-  end
-  deprecate :reachable?
-end
+ActiveSupport::Deprecation.warn("reachable is deprecated and will be removed from the framework.")

activesupport/test/core_ext/module/reachable_test.rb

-# frozen_string_literal: true
-
-require "abstract_unit"
-require "active_support/core_ext/module/reachable"
-
-class AnonymousTest < ActiveSupport::TestCase
-  test "an anonymous class or module is not reachable" do
-    assert_deprecated do
-      assert_not_predicate Module.new, :reachable?
-      assert_not_predicate Class.new, :reachable?
-    end
-  end
-
-  test "ordinary named classes or modules are reachable" do
-    assert_deprecated do
-      assert_predicate Kernel, :reachable?
-      assert_predicate Object, :reachable?
-    end
-  end
-
-  test "a named class or module whose constant has gone is not reachable" do
-    c = eval "class C; end; C"
-    m = eval "module M; end; M"
-
-    self.class.send(:remove_const, :C)
-    self.class.send(:remove_const, :M)
-
-    assert_deprecated do
-      assert_not_predicate c, :reachable?
-      assert_not_predicate m, :reachable?
-    end
-  end
-
-  test "a named class or module whose constants store different objects are not reachable" do
-    c = eval "class C; end; C"
-    m = eval "module M; end; M"
-
-    self.class.send(:remove_const, :C)
-    self.class.send(:remove_const, :M)
-
-    eval "class C; end"
-    eval "module M; end"
-
-    assert_deprecated do
-      assert_predicate C, :reachable?
-      assert_predicate M, :reachable?
-      assert_not_predicate c, :reachable?
-      assert_not_predicate m, :reachable?
-    end
-  end
-end