Fixed appveyor build script

Author: kriskbx

appveyor.yml

@@ -17,7 +17,6 @@ install:
   - npm install -g [email protected]
   - set PATH=%APPDATA%\npm;%PATH%
   - yarn install --production=false
-  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
 matrix:
   fast_finish: true
 build: off