ci: Remove appveyor

we now have github action windows workflows...

.appveyor.yml

@@ -1,73 +0,0 @@
-version: '{build}'
-shallow_clone: true
-
-platform: x64
-
-environment:
-  MSBUILD_FLAGS: /verbosity:minimal /maxcpucount
-  APPVEYOR_SAVE_CACHE_ON_ERROR: true
-  matrix:
-# Makefile
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    VS_VERSION: 2019
-    BUILDER: make
-    LANGUAGE: cc
-
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    VS_VERSION: 2019
-    BUILDER: make
-    LANGUAGE: python
-
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    VS_VERSION: 2019
-    BUILDER: make
-    LANGUAGE: java
-
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    VS_VERSION: 2019
-    BUILDER: make
-    LANGUAGE: dotnet
-# CMake
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    VS_VERSION: 2019
-    BUILDER: cmake
-    CMAKE_GENERATOR: "Visual Studio 16 2019"
-
-matrix:
-  fast_finish: false
-
-cache:
-  - dependencies\install -> makefiles\Makefile.third_party.win.mk
-  - build\dependencies\install -> cmake\dependencies
-
-before_build:
-  - git config --global user.email "ci@appveyor.com"
-  - git config --global user.name "CI"
-  - if "%VS_VERSION%"=="2017" call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
-  - if "%VS_VERSION%"=="2019" call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-  - set PATH=C:\Python38-x64;%PATH%
-  - tools\win\which.exe python.exe
-  - python -V
-  - python -m pip install virtualenv wheel absl-py mypy-protobuf
-  - set PATH=C:\Python38-x64\Scripts;%PATH%
-  - tools\win\which.exe protoc-gen-mypy
-  - tools\win\which.exe dotnet.exe
-  - dotnet --info
-  - set "JAVA_HOME=C:\Program Files\Java\jdk11"
-  - set "PATH=C:\Program Files\Java\jdk11\bin;%PATH%"
-  - java -version
-  - set CMAKE_BUILD_PARALLEL_LEVEL=4
-  - if "%BUILDER%"=="cmake" cmake --version
-  - if "%BUILDER%"=="cmake" cmake -S. -Bbuild -DCMAKE_BUILD_TYPE:STRING=Release -DBUILD_DEPS:BOOL=ON -G "%CMAKE_GENERATOR%" || VER>NUL
-  - if "%BUILDER%"=="make" del "C:\Program Files\Git\usr\bin\sh.exe"
-  - if "%BUILDER%"=="make" tools\make.exe detect
-
-build_script:
-  - if "%BUILDER%"=="cmake" cmake --build build --config Release --target ALL_BUILD -- %MSBUILD_FLAGS%
-  - if "%BUILDER%"=="make" tools\make.exe help_%LANGUAGE%
-  - if "%BUILDER%"=="make" ( tools\make.exe %LANGUAGE% || ( tools\make.exe third_party && tools\make.exe %LANGUAGE% ) )
-  - if "%BUILDER%"=="make" tools\make.exe test_%LANGUAGE%
-  - if "%LANGUAGE%"=="cc" tools\make.exe test_fz
-
-test_script:
-  - if "%BUILDER%"=="cmake" cmake --build build --config Release --target RUN_TESTS

README.md

@@ -1,13 +1,5 @@
 # OR-Tools - Google Optimization Tools
 
-[![Build Status][github_status]][github_link]
-[![Build Status][appveyor_status]][appveyor_link]
-
-[github_status]: https://github.com/google/or-tools/actions/workflows/cmake_linux_cpp.yml/badge.svg?branch=master
-[github_link]: https://github.com/google/or-tools/actions/workflows/cmake_linux_cpp.yml
-[appveyor_status]: https://ci.appveyor.com/api/projects/status/9hyykkcm8sh3ua6x/branch/master?svg=true
-[appveyor_link]: https://ci.appveyor.com/project/lperron/or-tools-98u1n
-
 [![PyPI version](https://img.shields.io/pypi/v/ortools.svg)](https://pypi.org/project/ortools/)
 [![PyPI download](https://img.shields.io/pypi/dm/ortools.svg)](https://pypi.org/project/ortools/#files)
 [![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/google/or-tools/master)