Removed test with wrong imu sensor name

[delihus]

After #304 checking wrong imu sensor name test is unnecessary.

Before:

[ RUN      ] TestPantherImuSensor.CheckSensorName
/home/deli/Documents/panther_dev/panther_ros/panther_hardware_interfaces/test/test_panther_imu.cpp:362: Failure
Expected: { imu_sensor_->CheckSensorName(); } throws an exception of type std::runtime_error.
  Actual: it throws nothing.
[  FAILED  ] TestPantherImuSensor.CheckSensorName (6 ms)

After:

[ RUN      ] TestPantherImuSensor.CheckSensorName
[       OK ] TestPantherImuSensor.CheckSensorName (6 ms)