thermal: intel: intel_pch_thermal: Drop explicit driver data clearing

thermal: intel: intel_pch_thermal: Drop explicit driver data clearing

The driver uses devm_kzalloc() for device allocation, making the
pci_set_drvdata(pdev, NULL) call in the remove path unnecessary.

The driver core clears drvdata automatically during device removal.

Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
[ rjw: Subject rewrite ]
Link: https://patch.msgid.link/20251215091352.1250531-1-kaushlendra.kumar@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>