iwlagn: remove hw_wa_rev

The variable is never used.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -3688,7 +3688,6 @@ struct ieee80211_ops iwlagn_hw_ops = {
 static void iwl_hw_detect(struct iwl_priv *priv)
 {
 	priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
-	priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 	priv->rev_id = priv->pci_dev->revision;
 	IWL_DEBUG_INFO(priv, "HW Revision ID = 0x%X\n", priv->rev_id);
 }

drivers/net/wireless/iwlwifi/iwl-dev.h

@@ -1254,7 +1254,6 @@ struct iwl_priv {
 	/* pci hardware address support */
 	void __iomem *hw_base;
 	u32  hw_rev;
-	u32  hw_wa_rev;
 	u8   rev_id;
 
 	/* microcode/device supports multiple contexts */