Remove build_podspec.sh (#144)

Motivation:

We no longer support Cocoapods

Modifications:

- Remove build_podspec.sh

Result:

Fewer unused files

scripts/build_podspec.sh

@@ -1,103 +0,0 @@
-#!/bin/bash
-##===----------------------------------------------------------------------===##
-##
-## This source file is part of the SwiftNIO open source project
-##
-## Copyright (c) 2017-2018 Apple Inc. and the SwiftNIO project authors
-## Licensed under Apache License v2.0
-##
-## See LICENSE.txt for license information
-## See CONTRIBUTORS.txt for the list of SwiftNIO project authors
-##
-## SPDX-License-Identifier: Apache-2.0
-##
-##===----------------------------------------------------------------------===##
-
-set -eu
-
-function usage() {
-  echo "$0 [-u] version nio_version"
-  echo
-  echo "OPTIONS:"
-  echo "  -u: Additionally upload the podspec"
-}
-
-upload=false
-while getopts ":u" opt; do
-  case $opt in
-    u)
-      upload=true
-      ;;
-    \?)
-      usage
-      exit 1
-      ;;
-  esac
-done
-shift "$((OPTIND-1))"
-
-if [[ $# -lt 2 ]]; then
-  usage
-  exit 1
-fi
-
-version=$1
-NAME="SwiftNIOTransportServices"
-
-# Current SwiftNIO Version to add as dependency in the .podspec
-nio_version=$2
-if [[ $nio_version =~ ^([0-9]+)\. ]]; then
-  # Extract and incremenet the major version to use an upper bound on the
-  # version requirement (we can't use '~>' as it means 'up to the next
-  # major' if you specify x.y and 'up to the next minor' if you specify x.y.z).
-  next_major_version=$((${BASH_REMATCH[1]} + 1))
-else
-  echo "Invalid NIO version '$nio_version'"
-  exit 1
-fi
-
-here="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-tmpdir=$(mktemp -d /tmp/.build_podspecsXXXXXX)
-echo "Building podspec in $tmpdir"
-
-cat > "${tmpdir}/${NAME}.podspec" <<- EOF
-Pod::Spec.new do |s|
-  s.name = '$NAME'
-  s.version = '$version'
-  s.license = { :type => 'Apache 2.0', :file => 'LICENSE.txt' }
-  s.summary = 'Extensions for SwiftNIO to support Apple platforms as first-class citizens.'
-  s.homepage = 'https://github.com/apple/swift-nio-transport-services'
-  s.author = 'Apple Inc.'
-  s.source = { :git => 'https://github.com/apple/swift-nio-transport-services.git', :tag => s.version.to_s }
-  s.documentation_url = 'https://github.com/apple/swift-nio-transport-services'
-  s.module_name = 'NIOTransportServices'
-
-  s.swift_version = '5.0'
-  s.cocoapods_version = '>=1.6.0'
-  s.ios.deployment_target = '10.0'
-  s.osx.deployment_target = '10.12'
-  s.tvos.deployment_target = '10.0'
-  s.watchos.deployment_target = '6.0'
-
-  s.source_files = 'Sources/NIOTransportServices/**/*.swift'
-  s.dependency 'CNIOAtomics', '>= $nio_version', '< $next_major_version'
-  s.dependency 'CNIODarwin', '>= $nio_version', '< $next_major_version'
-  s.dependency 'CNIOLinux', '>= $nio_version', '< $next_major_version'
-  s.dependency 'CNIOWindows', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIO', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOConcurrencyHelpers', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOConcurrencyHelpers', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOCore', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOEmbedded', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOFoundationCompat', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOPosix', '>= $nio_version', '< $next_major_version'
-  s.dependency 'SwiftNIOTLS', '>= $nio_version', '< $next_major_version'
-  s.dependency '_NIODataStructures', '>= $nio_version', '< $next_major_version'
-end
-EOF
-
-if $upload; then
-  echo "Uploading ${tmpdir}/${NAME}.podspec"
-  pod trunk push --synchronous "${tmpdir}/${NAME}.podspec"
-fi
-