iwlagn: don't read the PCI_REVISION_ID from iwl-agn.c

The PCI_REVISION_ID is read and printed in iwl_pci_probe anyway using pr_info
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -3352,10 +3352,6 @@ struct ieee80211_ops iwlagn_hw_ops = {
 
 static u32 iwl_hw_detect(struct iwl_priv *priv)
 {
-	u8 rev_id;
-
-	pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
-	IWL_DEBUG_INFO(priv, "HW Revision ID = 0x%X\n", rev_id);
 	return iwl_read32(priv, CSR_HW_REV);
 }