build: remove appveyor config and README badge

With PRs #1474 an #1480 merged, the migration to Azure Pipelines is complete.

README.md

@@ -3,7 +3,6 @@
 [![npm](https://img.shields.io/npm/dm/embark.svg)](https://npmjs.com/package/embark)
 [![Gitter](https://img.shields.io/gitter/room/embark-framework/Lobby.svg)](https://gitter.im/embark-framework/Lobby)
 [![Build Status](https://dev.azure.com/embark-framework/Embark/_apis/build/status/embark-framework.embark?branchName=master)](https://dev.azure.com/embark-framework/Embark/_build/latest?definitionId=1&branchName=master)
-[![Build status](https://ci.appveyor.com/api/projects/status/nnq38x2hi3q11o44/branch/master?svg=true)](https://ci.appveyor.com/project/iurimatias/embark/branch/master)
 ![Open PRs](https://img.shields.io/github/issues-pr-raw/embark-framework/embark.svg)
 ![Closed PRs](https://img.shields.io/github/issues-pr-closed-raw/embark-framework/embark.svg)
 ![GitHub commit activity the past week, 4 weeks, year](https://img.shields.io/github/commit-activity/y/embark-framework/embark.svg)

appveyor.yml

@@ -1,33 +0,0 @@
-environment:
-  matrix:
-    - nodejs_version: "8"
-    - nodejs_version: "10"
-cache:
- - "%LOCALAPPDATA%\\Yarn"
-install:
-  - ps: Install-Product node $env:nodejs_version
-  - node --version
-  - npm --version
-  - ps: |
-      "installing IPFS"
-      $IPFS_VER="0.4.18"
-      pushd
-      mkdir C:\Downloads | out-null; cd C:\Downloads
-      Start-FileDownload "https://dist.ipfs.io/go-ipfs/v$($IPFS_VER)/go-ipfs_v$($IPFS_VER)_windows-amd64.zip"
-      7z x .\go-ipfs*
-      Remove-Variable IPFS_VER
-      $ENV:PATH="C:\Downloads\go-ipfs;$ENV:PATH"
-      popd
-      ipfs init
-  - ps: |
-      "installing Yarn"
-      $YARN_VER="1.12.3"
-      Start-FileDownload "https://github.com/yarnpkg/yarn/releases/download/v$($YARN_VER)/yarn-$($YARN_VER).msi"
-      cmd /c start /wait msiexec.exe /i "yarn-$($YARN_VER).msi" /quiet /qn /norestart
-      rm "yarn-$($YARN_VER).msi"
-      Remove-Variable YARN_VER
-  - yarn --version
-  - echo embark installation managed by package.json script 'ci'
-test_script:
-  - npm run ci:full
-build: off