drm/amdkfd: clean up code for interrupt v10

Variable hub_inst is unused.

Fixes: e28604d8 ("drm/amdkfd: Drop poison hanlding from gfx v10")
Signed-off-by: Jesse Zhang <jesse.zhang@amd.com>
Reviewed-by: Tim Huang <tim.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_int_process_v10.c

@@ -306,23 +306,8 @@ static void event_interrupt_wq_v10(struct kfd_node *dev,
 		   client_id == SOC15_IH_CLIENTID_UTCL2) {
 		struct kfd_vm_fault_info info = {0};
 		uint16_t ring_id = SOC15_RING_ID_FROM_IH_ENTRY(ih_ring_entry);
-		uint32_t node_id = SOC15_NODEID_FROM_IH_ENTRY(ih_ring_entry);
-		uint32_t vmid_type = SOC15_VMID_TYPE_FROM_IH_ENTRY(ih_ring_entry);
-		int hub_inst = 0;
 		struct kfd_hsa_memory_exception_data exception_data;
 
-		/* gfxhub */
-		if (!vmid_type && dev->adev->gfx.funcs->ih_node_to_logical_xcc) {
-			hub_inst = dev->adev->gfx.funcs->ih_node_to_logical_xcc(dev->adev,
-				node_id);
-			if (hub_inst < 0)
-				hub_inst = 0;
-		}
-
-		/* mmhub */
-		if (vmid_type && client_id == SOC15_IH_CLIENTID_VMC)
-			hub_inst = node_id / 4;
-
 		info.vmid = vmid;
 		info.mc_id = client_id;
 		info.page_addr = ih_ring_entry[4] |