message: Fix a bug where plugin factory didn't reset the unique_ptr but release it (thus cause mem leak).
diff: @@ -65,9 +65,6 @@ bool PluginFactoryTensorRT::RegisterPlugin(
  void PluginFactoryTensorRT::DestroyPlugins() {
  tensorflow::mutex_lock lock(instance_m_);
  - for (auto& owned_plugin_ptr : owned_plugins_) {
  - owned_plugin_ptr.release();
  - }
  owned_plugins_.clear();
  }
  