`silence_stream` method was removed from Rails 5.

[kenchan0130]

Hi,

When I run test this project, it failed.
Because it was installed Rails 5 removed the silence_stream method like this:

NoMethodError:
        undefined method `silence_stream' for #<RSpec::ExampleGroups::StatesmanAdaptersActiveRecordQueries::InState::GivenTheInitialState:0x007fe3cc10d148>
      # ./spec/spec_helper.rb:76:in `prepare_model_table'
      # ./spec/statesman/adapters/active_record_queries_spec.rb:5:in `block (2 levels) in <top (required)>'

  68) Statesman::Adapters::ActiveRecordQueries.in_state merging two queries
      Failure/Error:
        silence_stream(STDOUT) do
          CreateMyActiveRecordModelMigration.migrate(:up)
        end

I think about removing silence_stream method (and block).
How you do you feel about it?

---

References

Discussion: rails/rails#13139
Deprecation (4.2.0): rails/rails#13392
Removal (5.0.0): rails/rails@481e49c

[kenchan0130]

ops, I'm sorry, I mistook referenced branch.