Merge pull request #79 from ko1/revert_45816b1b2602278b6d6e069d36b24fd5e3437bdd

Revert "Exclude constantly-failing test on x86_64-darwin"

Author: ko1

test/test_timeout.rb

@@ -302,6 +302,5 @@ def test_ractor
 
       assert_equal :ok, r
     end;
-  end if defined?(::Ractor) && RUBY_VERSION >= '4.0' && !RUBY_PLATFORM.include?('x86_64-darwin')
-  # Exclude on x86_64-darwin as it failed 4 times out of 4 tries in the CI of ruby/ruby-dev-builder
+  end if defined?(::Ractor) && RUBY_VERSION >= '4.0'
 end