usb: phy: ab8500-usb: Remove redundant platform_set_drvdata()

Commit 0998d06310 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-ab8500-usb.c

@@ -892,8 +892,6 @@ static int ab8500_usb_remove(struct platform_device *pdev)
 	else if (ab->mode == USB_PERIPHERAL)
 		ab8500_usb_peri_phy_dis(ab);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }