Remove unused usb-server ebuild

chromeos-base/usb-server/usb-server-0.1-r2.ebuild

-# Copyright (c) 2010 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.
-
-EAPI="2"
-
-DESCRIPTION="Install stubs for USB server from www.incentivespro.com"
-
-# This package is all BSD, but it contains a locally-written installer
-# script that downloads and installs a free-as-in-beer EULA'd package
-# from www.incentivespro.com.  This is only run by the end-user (and
-# only for test systems); we do not distribute it as part of CrOS.
-# The license for the software that is downloaded is in
-# files/LICENSE.incentivespro
-
-LICENSE="BSD"
-SLOT="0"
-KEYWORDS="x86"
-IUSE=""
-
-RDEPEND=""
-DEPEND="${RDEPEND}"
-
-src_install() {
-  dobin "${FILESDIR}"/install-usbsrv
-  dobin "${FILESDIR}"/usbsrv
-}