Remove unnecessary environment variables from AppVeyor configuration (#261)
Remove unnecessary environment variables from AppVeyor configuration (#261)


GKotfis/csharp,robkeim/xcsharp,GKotfis/csharp,ErikSchierboom/xcsharp,robkeim/xcsharp,exercism/xcsharp,exercism/xcsharp,ErikSchierboom/xcsharp