ist8310: remove calibration code

[bkueng]

• it does nothing useful
• increases boot time by 2 seconds on pixhawk 4 due to a poll timeout:

IST8310 on I2C bus 3 at 0x0e (bus: 100 KHz, max: 400 KHz)
WARN  [ist8310] ERROR: TIMEOUT 2

[codecov]

Codecov Report

Merging #14115 into master will decrease coverage by 16.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master   #14115       +/-   ##
===========================================
- Coverage   54.48%   38.47%   -16.02%     
===========================================
  Files         605      605               
  Lines       51256    51208       -48     
===========================================
- Hits        27929    19701     -8228     
- Misses      23327    31507     +8180

Flag	Coverage Δ
#mavsdk	?
#python	6.08% <ø> (+2.92%)	⬆️
#sitl_mission_FW	?
#sitl_mission_MC_box	?
#sitl_mission_MC_offboard_att	100% <ø> (ø)	⬆️
#sitl_mission_MC_offboard_pos	?
#sitl_mission_Rover	100% <ø> (+73.68%)	⬆️
#sitl_mission_VTOL_standard	?
#sitl_mission_VTOL_tailsitter	?
#sitl_python_FW	29.32% <ø> (-70.68%)	⬇️
#sitl_python_MC_box	?
#sitl_python_MC_offboard_att	28.43% <ø> (-0.01%)	⬇️
#sitl_python_MC_offboard_pos	28.84% <ø> (-71.16%)	⬇️
#sitl_python_Rover	100% <ø> (+73.6%)	⬆️
#sitl_python_VTOL_standard	100% <ø> (+66.11%)	⬆️
#sitl_python_VTOL_tailsitter	100% <ø> (+66.1%)	⬆️
#unittest	100% <ø> (+65.24%)	⬆️

Impacted Files	Coverage Δ
src/systemcmds/tests/test_bezierQuad.cpp	0% <0%> (-100%)	⬇️
src/lib/controllib/BlockLimitSym.cpp	0% <0%> (-100%)	⬇️
src/modules/navigator/mission_block.h	0% <0%> (-100%)	⬇️
src/systemcmds/tests/test_search_min.cpp	0% <0%> (-100%)	⬇️
src/systemcmds/tests/test_hrt.cpp	0% <0%> (-100%)	⬇️
...c/modules/mavlink/mavlink_tests/mavlink_ftp_test.h	0% <0%> (-100%)	⬇️
src/modules/navigator/takeoff.h	0% <0%> (-100%)	⬇️
src/modules/navigator/land.h	0% <0%> (-100%)	⬇️
...ontrollib/controllib_test/controllib_test_main.cpp	0% <0%> (-100%)	⬇️
src/lib/weather_vane/WeatherVane.cpp	0% <0%> (-100%)	⬇️
... and 264 more

[dagar]

Same copypasta in the lis3mdl as well? https://github.com/PX4/Firmware/blob/225a3a0cbaa8e8f04fbbff2bf4c73f96a681fd23/src/drivers/magnetometer/lis3mdl/lis3mdl.cpp#L117