removed unused nuget stores

Author: david-driscoll

.appveyor.yml

@@ -9,5 +9,4 @@ after_build:
 artifacts:
   - path: ./artifacts/nuget/*.nupkg
 nuget:
-  account_feed: true
   project_feed: true

nuget.config

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
-    <add key="Build Packages" value="https://www.myget.org/F/c037199d-41df-4567-b966-25ff65324688/api/v3/index.json" />
     <add key="NuGet.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
 </configuration>