usb: core: lpm: remove usb3_lpm_enabled in usb_device

Commit 8306095f ("USB: Disable USB 3.0 LPM in critical sections.")
adds usb3_lpm_enabled member to struct usb_device. There is no reference
to this member now. Hence, it could be removed.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/usb.h

@@ -510,7 +510,6 @@ struct usb3_lpm_parameters {
  * @usb2_hw_lpm_besl_capable: device can perform USB2 hardware BESL LPM
  * @usb2_hw_lpm_enabled: USB2 hardware LPM is enabled
  * @usb2_hw_lpm_allowed: Userspace allows USB 2.0 LPM to be enabled
- * @usb3_lpm_enabled: USB3 hardware LPM enabled
  * @usb3_lpm_u1_enabled: USB3 hardware U1 LPM enabled
  * @usb3_lpm_u2_enabled: USB3 hardware U2 LPM enabled
  * @string_langid: language ID for strings
@@ -585,7 +584,6 @@ struct usb_device {
 	unsigned usb2_hw_lpm_besl_capable:1;
 	unsigned usb2_hw_lpm_enabled:1;
 	unsigned usb2_hw_lpm_allowed:1;
-	unsigned usb3_lpm_enabled:1;
 	unsigned usb3_lpm_u1_enabled:1;
 	unsigned usb3_lpm_u2_enabled:1;
 	int string_langid;