Meaningless console output

[rohanpsingh]

mc_mujoco/src/mj_sim.cpp

Lines 233 to 234 in dd944da

	mc_rtc::log::error("[mc_mujoco] No MuJoCo {} for {} {} in {}, expected to find a {} named {}", mj_name,
	sensor_name, mc_name, name, mj_name, mj_sensor);

This causes the following errors to be logged:

[error] [mc_mujoco] No MuJoCo gyro sensor for Default body sensor in ground, expected to find a gyro sensor named ground_Default_gyro
[error] [mc_mujoco] No MuJoCo accelerometer sensor for Default body sensor in ground, expected to find a accelerometer sensor named ground_Default_accelerometer

They are not really errors so perhaps ground robot should be removed from this check?