e1000: remove unused part_num reading code

Remove the code that reads part_num from the EEPROM. This part number
is never displayed or queryable by the user.
Signed-off-by: NAuke Kok <auke-jan.h.kok@intel.com>

drivers/net/e1000/e1000.h

@@ -245,7 +245,6 @@ struct e1000_adapter {
 	uint16_t mng_vlan_id;
 	uint32_t bd_number;
 	uint32_t rx_buffer_len;
-	uint32_t part_num;
 	uint32_t wol;
 	uint32_t ksp3_port_a;
 	uint32_t smartspeed;

drivers/net/e1000/e1000_hw.c

@@ -5555,40 +5555,6 @@ e1000_commit_shadow_ram(struct e1000_hw *hw)
     return error;
 }
 
-/******************************************************************************
- * Reads the adapter's part number from the EEPROM
- *
- * hw - Struct containing variables accessed by shared code
- * part_num - Adapter's part number
- *****************************************************************************/
-int32_t
-e1000_read_part_num(struct e1000_hw *hw,
-                    uint32_t *part_num)
-{
-    uint16_t offset = EEPROM_PBA_BYTE_1;
-    uint16_t eeprom_data;
-
-    DEBUGFUNC("e1000_read_part_num");
-
-    /* Get word 0 from EEPROM */
-    if (e1000_read_eeprom(hw, offset, 1, &eeprom_data) < 0) {
-        DEBUGOUT("EEPROM Read Error\n");
-        return -E1000_ERR_EEPROM;
-    }
-    /* Save word 0 in upper half of part_num */
-    *part_num = (uint32_t) (eeprom_data << 16);
-
-    /* Get word 1 from EEPROM */
-    if (e1000_read_eeprom(hw, ++offset, 1, &eeprom_data) < 0) {
-        DEBUGOUT("EEPROM Read Error\n");
-        return -E1000_ERR_EEPROM;
-    }
-    /* Save word 1 in lower half of part_num */
-    *part_num |= eeprom_data;
-
-    return E1000_SUCCESS;
-}
-
 /******************************************************************************
  * Reads the adapter's MAC address from the EEPROM and inverts the LSB for the
  * second function of dual function devices

drivers/net/e1000/e1000_main.c

@@ -853,8 +853,6 @@ e1000_probe(struct pci_dev *pdev,
 		goto err_eeprom;
 	}
 
-	e1000_read_part_num(&adapter->hw, &(adapter->part_num));
-
 	e1000_get_bus_info(&adapter->hw);
 
 	init_timer(&adapter->tx_fifo_stall_timer);