drivers: modem: cellular: nRF91: Remove periodic chat script

[SeppoTakalo]

Remove periodic chat script as the AT+CEREG=1 notifications are already enabled.

[SeppoTakalo]

Test failure seems unrelated 909/909 native_sim/native boards.native_sim.reset_hw_info

Rebased to trigger a rebuild.

[SeppoTakalo]

Rebased again... I don't think the build issues are related:

INFO    - The following issues were found (showing the top 10 items):
INFO    - 1) drivers.sensor.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 2) drivers.sensor.generic_test on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 3) drivers.sensor.no_default.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 4) drivers.sensor.pm.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 5) drivers.sensor.sensorhub.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 6) drivers.sensor.trigger.global.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 7) drivers.sensor.trigger.none.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)
INFO    - 8) drivers.sensor.trigger.own.build on native_sim/native error (Build failure - error: macro "SPI_DT_IODEV_DEFINE" passed 4 arguments, but takes just 3)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud