libusb: remove forced GCC usage.

libusb seems to be working correctly with ToT clang in Chrome OS
so remove the forced GCC workaround.

BUG=chromium:723145, chromium:979914
TEST=rebuild libusb in sdk; cros_sdk --no-ns-pid ; sudo servod

Change-Id: If7bea2349ddce2bc5f89c6b84e7f71d29e0e7718
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2595672
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: YH Lin <yueherngl@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
diff --git a/chromeos/config/env/dev-libs/libusb b/chromeos/config/env/dev-libs/libusb
deleted file mode 100644
index ea90990..0000000
--- a/chromeos/config/env/dev-libs/libusb
+++ /dev/null
@@ -1,10 +0,0 @@
-# Copyright 2017 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# servod is unhappy when libusb is built w/clang.  https://crbug.com/723145
-# Filter sanitizer flags since it is built with GCC, https://crbug.com/841865
-cros_pre_src_prepare_use_gcc() {
-	cros_use_gcc
-	filter_sanitizers
-}
diff --git a/dev-libs/libusb/libusb-1.0.22-r2.ebuild b/dev-libs/libusb/libusb-1.0.22-r3.ebuild
similarity index 100%
rename from dev-libs/libusb/libusb-1.0.22-r2.ebuild
rename to dev-libs/libusb/libusb-1.0.22-r3.ebuild