message: remove count arg from evergreen benchmarks
diff: @@ -375,9 +375,11 @@ void BenchmarkResults::save_results()
  metric_objs.push_back(make_result_obj("stddev", result.stddev));
  }
  - test_results.push_back(json{{"info", json{{"test_name", measurement.first},
  + test_results.push_back(json{{"info",
  + json{
  + {"test_name", measurement.first},
  {"parent", m_suite_name},
  - {"args", json{{"count", result.rep}}}}},
  + }},
  {"metrics", std::move(metric_objs)}});
  }
  