Fix T1000-E sensor power pin mapping

[robekl]

Summary

• stop treating T1000-E P0.04 as a sensor power-enable output
• remove the extra SENSOR_EN rail toggle from the T1000-E sensor path
• keep sensor power control on the documented PIN_3V3_EN / P1.06 rail

Issue

The current T1000-E variant defines two different sensor-power control signals:

• PIN_3V3_EN = 38 (P1.06)
• SENSOR_EN = 4 (P0.04)

The firmware actively drives both of them:

• initVariant() configures both as outputs and drives them low
• t1000e_get_temperature() and t1000e_get_light() drive both high before sampling
• powerOff() drives both low again

That is hard to reconcile with Seeed's newer official T1000-E pin table, which documents:

• P1.06 as Sensor VCC Enable
• P0.04 as VCC voltage detect

If that mapping is correct, the current variant is driving a voltage-detect input as if it were a rail-enable output.

Authoritative source

Seeed Studio's newer official board page:

• https://wiki.seeedstudio.com/get_started_with_lorawan_tracker/

Relevant entries from the pin table:

• P0.04 = VCC voltage detect
• P1.06 = Sensor VCC Enable
• P0.05 = Charger insert detect
• P1.03 = Charger State

The older page at https://wiki.seeedstudio.com/t1000_e_intro/ is less complete and conflicts with this newer table.

Fix

This change removes the stale SENSOR_EN definition and stops driving P0.04 anywhere in the T1000-E implementation.

After this change:

• the board no longer configures P0.04 as an output
• temp/light reads only toggle PIN_3V3_EN
• power-off no longer tries to drive an extra sensor-enable pin

Why this fixes it

This keeps sensor rail control on the pin Seeed currently documents for that purpose (P1.06) and removes the most likely incorrect electrical behavior in the current tree: treating P0.04 as an output control line.

It also avoids changing unrelated GPS, charging, or battery logic. The fix is intentionally narrow: remove the extra power-enable path that conflicts with the newer hardware documentation.

Validation

• pio run -e t1000e_companion_radio_ble