appveyor.yml in knife-windows-1.8.0 vs appveyor.yml in knife-windows-1.9.0

@@ -6,12 +6,9 @@
 
 environment:
   bundle_gemfile: ci.gemfile
 
   matrix:
-    - ruby_version: "20"
-      chef_version: "< 12"
-
     - ruby_version: "23"
       chef_version: "~> 12.0"
 
     - ruby_version: "23"
       chef_version: "master"