Remove deprecated method Refinement#refined_class

[Feature #20901]

Author: shugo

NEWS.md

@@ -51,6 +51,10 @@ Note: We're only listing outstanding class updates.
         #=> [2022-02-24 00:00:00 UTC, 2022-02-25 00:00:00 UTC, 2022-02-26 00:00:00 UTC]
         ```
 
+* Refinement
+
+    * Removed deprecated method Refinement#refined_class. [[Feature #19714]]
+
 * RubyVM::AbstractSyntaxTree
 
     * Add RubyVM::AbstractSyntaxTree::Node#locations method which returns location objects

eval.c

@@ -1403,21 +1403,6 @@ rb_refinement_module_get_refined_class(VALUE module)
     return rb_attr_get(module, id_refined_class);
 }
 
-/*
- *  call-seq:
- *     refined_class    -> class
- *
- *  Deprecated; prefer #target.
- *
- *  Return the class refined by the receiver.
- */
-static VALUE
-rb_refinement_refined_class(VALUE module)
-{
-    rb_warn_deprecated_to_remove("3.4", "Refinement#refined_class", "Refinement#target");
-    return rb_refinement_module_get_refined_class(module);
-}
-
 static void
 add_activated_refinement(VALUE activated_refinements,
                          VALUE klass, VALUE refinement)
@@ -2131,7 +2116,6 @@ Init_eval(void)
     rb_undef_method(rb_cClass, "refine");
     rb_define_private_method(rb_cRefinement, "import_methods", refinement_import_methods, -1);
     rb_define_method(rb_cRefinement, "target", rb_refinement_module_get_refined_class, 0);
-    rb_define_method(rb_cRefinement, "refined_class", rb_refinement_refined_class, 0);
     rb_undef_method(rb_cRefinement, "append_features");
     rb_undef_method(rb_cRefinement, "prepend_features");
     rb_undef_method(rb_cRefinement, "extend_object");

test/ruby/test_refinement.rb

@@ -1824,13 +1824,7 @@ def test_target
       end
     }.refinements
     assert_equal(Integer, refinements[0].target)
-    assert_warn(/Refinement#refined_class is deprecated and will be removed in Ruby 3.4; use Refinement#target instead/) do
-      assert_equal(Integer, refinements[0].refined_class)
-    end
     assert_equal(String, refinements[1].target)
-    assert_warn(/Refinement#refined_class is deprecated and will be removed in Ruby 3.4; use Refinement#target instead/) do
-      assert_equal(String, refinements[1].refined_class)
-    end
   end
 
   def test_warn_setconst_in_refinmenet