refactor: ignore thead physical index

Signed-off-by: thxCode <thxcode0824@gmail.com>

Author: thxCode

gpustack_runtime/detector/thead.py

@@ -161,9 +161,6 @@ def detect(self) -> Devices | None:
                     dev_mig_mode, _ = pyhgml.hgmlDeviceGetMigMode(dev)
 
                 dev_index = dev_idx
-                if envs.GPUSTACK_RUNTIME_DETECT_PHYSICAL_INDEX_PRIORITY:
-                    with contextlib.suppress(pyhgml.HGMLError):
-                        dev_index = pyhgml.hgmlDeviceGetMinorNumber(dev)
 
                 # With MIG disabled, treat as a single device.