Disabled http proxy.

Author: dirk

appveyor.yml

@@ -55,7 +55,6 @@ environment:
       im_name:     "source"
 
 install:
-  - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-http-proxy.ps1'))
   - cd AppVeyor
   - Install.cmd %im_platform%