gs101: usb: remove flag "OLDER_GADGET"

The flag "OLDER_GADGET" is no need.
Using "11110000.dwc3" be the udc name.

Test: Build Pass and boot to home
Bug: 177879761
Signed-off-by: Ricky Niu <rickyniu@google.com>
Change-Id: I43c9e2815a6384c4dffdc47312fa0f372b34d9e9
diff --git a/usb/UsbGadget.h b/usb/UsbGadget.h
index 3cb3170..2669f8d 100644
--- a/usb/UsbGadget.h
+++ b/usb/UsbGadget.h
@@ -70,12 +70,9 @@
 using ::android::hardware::usb::gadget::V1_2::GadgetFunction;
 using ::std::string;
 
-#ifdef OLDER_GADGET
 constexpr char kGadgetName[] = "11110000.dwc3";
+#ifndef UDC_PATH
 #define UDC_PATH "/sys/class/udc/11110000.dwc3/"
-#else
-constexpr char kGadgetName[] = "11110000.usb";
-#define UDC_PATH "/sys/class/udc/11110000.usb/"
 #endif
 static MonitorFfs monitorFfs(kGadgetName);