Revert "usb: dwc3: Reset the transfer resource index on SET_INTERFACE"

It was applied to the wrong function.

This reverts commit 15488de7.

drivers/usb/dwc3/ep0.c

@@ -648,10 +648,6 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 		dev_vdbg(dwc->dev, "Status Phase\n");
 		dwc3_ep0_complete_req(dwc, event);
 		break;
-	case USB_REQ_SET_INTERFACE:
-		dev_vdbg(dwc->dev, "USB_REQ_SET_INTERFACE\n");
-		dwc->start_config_issued = false;
-		/* Fall through */
 	default:
 		WARN(true, "UNKNOWN ep0state %d\n", dwc->ep0state);
 	}