message: test: remove unnecessary GoogleTest flag.
  The "threadsafe" style is the default since
  While there, properly name the Death Test's test suite.
diff: @@ -19,9 +19,7 @@ struct ThreadFactorySingletonTest {
  };
  // Verify that Thread::threadFactorySingleton is defined and initialized for tests.
  -TEST(ThreadFactorySingleton, BasicDeathTest) {
  - ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  -
  +TEST(ThreadFactorySingletonDeathTest, BasicDeathTest) {
  // Verify that an ASSERT() will trigger due to a thread ID mismatch.
  ThreadFactorySingletonTest singleton_test;
  // Use std::thread instead of the ThreadFactory's createThread() to avoid the dependency on the
  