delete unused IOCTL GYROIOCGSAMPLERATE

src/drivers/drv_gyro.h

src/drivers/imu/adis16448/adis16448.cpp

src/drivers/imu/adis16477/ADIS16477.cpp

src/drivers/imu/bmi055/BMI055_gyro.cpp

src/drivers/imu/bmi160/bmi160.cpp

src/drivers/imu/fxas21002c/fxas21002c.cpp

src/drivers/imu/l3gd20/l3gd20.cpp

src/drivers/imu/mpu6000/mpu6000.cpp

src/drivers/imu/mpu9250/mpu9250.cpp

src/modules/simulator/gyrosim/gyrosim.cpp

src/systemcmds/config/config.c