Remove files during AppVeyor builds to help free up space. (#988)
Remove files during AppVeyor builds to help free up space. (#988)

This was recommended by the AppVeyor team as we hit an internal limit that caused an automated system to ban our account.
ILMTitan/google-cloud-visualstudio,ILMTitan/google-cloud-visualstudio,GoogleCloudPlatform/google-cloud-visualstudio,GoogleCloudPlatform/google-cloud-visualstudio,GoogleCloudPlatform/google-cloud-visualstudio,ILMTitan/google-cloud-visualstudio,ILMTitan/google-cloud-visualstudio,GoogleCloudPlatform/google-cloud-visualstudio,GoogleCloudPlatform/google-cloud-visualstudio,ILMTitan/google-cloud-visualstudio