Remove useless keyframe_vote retrieval

src/yaml/sensor_imu_yaml.cpp

@@ -28,7 +28,6 @@ static ParamsSensorBasePtr createParamsSensorImu(const std::string & _filename_d
     if (config["type"].as<std::string>() == "SensorImu")
     {
         YAML::Node variances        = config["motion_variances"];
-        YAML::Node kf_vote          = config["keyframe_vote"];
 
         ParamsSensorImuPtr params = std::make_shared<ParamsSensorImu>();