Remove AppVeyor and Travis

.appveyor.yml

@@ -1,13 +0,0 @@
-init:
-- git config --global core.autocrlf true
-branches:
-  only:
-  - dev
-  - /^release\/.*$/
-  - /^(.*\/)?ci-.*$/
-build_script:
-- ps: .\run.ps1 -ci default-build
-clone_depth: 1
-test: 'off'
-deploy: 'off'
-os: Visual Studio 2017

.travis.yml

@@ -1,27 +0,0 @@
-language: csharp
-sudo: required
-dist: trusty
-services:
-- docker
-addons:
-  apt:
-    packages:
-    - libunwind8
-mono: none
-os:
-- linux
-- osx
-osx_image: xcode8.2
-branches:
-  only:
-  - dev
-  - /^release\/.*$/
-  - /^(.*\/)?ci-.*$/
-before_install:
-- if test "$TRAVIS_OS_NAME" == "osx"; then brew update; brew install openssl; ln -s
-  /usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib /usr/local/lib/; ln -s /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
-  /usr/local/lib/; fi
-script:
-- ./build.sh --ci
-- if test "$TRAVIS_OS_NAME" != "osx"; then bash test/SystemdActivation/docker.sh;
-  fi