usb: phy: twl4030-usb: Remove unused irq_enabled

It's not being used any longer.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/phy-twl4030-usb.c

@@ -164,7 +164,6 @@ struct twl4030_usb {
 	enum omap_musb_vbus_id_status linkstat;
 	bool			vbus_supplied;
 	u8			asleep;
-	bool			irq_enabled;
 
 	struct delayed_work	id_workaround_work;
 };
@@ -755,7 +754,6 @@ static int twl4030_usb_probe(struct platform_device *pdev)
 	 * set_host() and/or set_peripheral() ... OTG_capable boards
 	 * need both handles, otherwise just one suffices.
 	 */
-	twl->irq_enabled = true;
 	status = devm_request_threaded_irq(twl->dev, twl->irq, NULL,
 			twl4030_usb_irq, IRQF_TRIGGER_FALLING |
 			IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl);