delete exampales attitude_estimator_ekf

src/examples/attitude_estimator_ekf/AttitudeEKF.m

src/examples/attitude_estimator_ekf/CMakeLists.txt

src/examples/attitude_estimator_ekf/attitudeKalmanfilter.prj

...es/attitude_estimator_ekf/attitude_estimator_ekf_main.cpp

...es/attitude_estimator_ekf/attitude_estimator_ekf_params.c

...es/attitude_estimator_ekf/attitude_estimator_ekf_params.h

src/examples/attitude_estimator_ekf/codegen/AttitudeEKF.c

src/examples/attitude_estimator_ekf/codegen/AttitudeEKF.h

...amples/attitude_estimator_ekf/codegen/AttitudeEKF_types.h

src/examples/attitude_estimator_ekf/codegen/rtwtypes.h