Docker: remove unused installers

docker/build/installers/install_opuslib.sh

-#!/usr/bin/env bash
-
-###############################################################################
-# Copyright 2019 The Apollo Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-###############################################################################
-
-# Fail on first error.
-set -e
-
-cd "$(dirname "${BASH_SOURCE[0]}")"
-
-# Prepare
-PACKAGE="2.0.0.tar.gz"
-OPUSLIB="opuslib-2.0.0"
-wget https://github.com/OnBeep/opuslib/archive/${PACKAGE}
-tar zxf ${PACKAGE}
-
-# Build and install.
-pushd ${OPUSLIB}
-  make
-  make install
-popd
-
-# Clean
-rm -fr ${PACKAGE} ${OPUSLIB}
-