Remove AppVeyor badge and workflow (nonstd-lite issue 79) [ci skip]

Author: martinmoene

README.md

@@ -1,6 +1,6 @@
 # expected lite: expected objects for C++11 and later
 
-[![Language](https://img.shields.io/badge/C%2B%2B-11-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization) [![License](https://img.shields.io/badge/license-BSL-blue.svg)](https://opensource.org/licenses/BSL-1.0) [![Build Status](https://github.com/martinmoene/expected-lite/actions/workflows/ci.yml/badge.svg)](https://github.com/martinmoene/expected-lite/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/sle31w7obrm8lhe1?svg=true)](https://ci.appveyor.com/project/martinmoene/expected-lite) [![Version](https://badge.fury.io/gh/martinmoene%2Fexpected-lite.svg)](https://github.com/martinmoene/expected-lite/releases) [![download](https://img.shields.io/badge/latest-download-blue.svg)](https://raw.githubusercontent.com/martinmoene/expected-lite/master/include/nonstd/expected.hpp) [![Conan](https://img.shields.io/badge/on-conan-blue.svg)](https://conan.io/center/expected-lite) [![Vcpkg](https://img.shields.io/badge/on-vcpkg-blue.svg)](https://vcpkg.link/ports/expected-lite) [![Try it online](https://img.shields.io/badge/on-wandbox-blue.svg)](https://wandbox.org/permlink/MnnwqOtE8ZQ4rRsv) [![Try it on godbolt online](https://img.shields.io/badge/on-godbolt-blue.svg)](https://godbolt.org/z/9BuMZx)
+[![Language](https://img.shields.io/badge/C%2B%2B-11-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization) [![License](https://img.shields.io/badge/license-BSL-blue.svg)](https://opensource.org/licenses/BSL-1.0) [![Build Status](https://github.com/martinmoene/expected-lite/actions/workflows/ci.yml/badge.svg)](https://github.com/martinmoene/expected-lite/actions/workflows/ci.yml) [![Version](https://badge.fury.io/gh/martinmoene%2Fexpected-lite.svg)](https://github.com/martinmoene/expected-lite/releases) [![download](https://img.shields.io/badge/latest-download-blue.svg)](https://raw.githubusercontent.com/martinmoene/expected-lite/master/include/nonstd/expected.hpp) [![Conan](https://img.shields.io/badge/on-conan-blue.svg)](https://conan.io/center/expected-lite) [![Vcpkg](https://img.shields.io/badge/on-vcpkg-blue.svg)](https://vcpkg.link/ports/expected-lite) [![Try it online](https://img.shields.io/badge/on-wandbox-blue.svg)](https://wandbox.org/permlink/MnnwqOtE8ZQ4rRsv) [![Try it on godbolt online](https://img.shields.io/badge/on-godbolt-blue.svg)](https://godbolt.org/z/9BuMZx)
 
 *expected lite* is a single-file header-only library for objects that either represent a valid value or an error that you can pass by value. It is intended for use with C++11 and later. The library is based on the [std::expected](http://wg21.link/p0323) proposal [1] .