remove appveyor.yml

site/appveyor.yml

@@ -1,17 +0,0 @@
-version: "{build}"
-
-shallow_clone: true
-
-init:
-  - git config --global core.autocrlf false
-
-build: off
-
-environment:
-  matrix:
-    # node.js
-    - nodejs_version: stable
-
-install:
-  - ps: Install-Product node $env:nodejs_version
-  - npm install