Update appveyor.yml
Update appveyor.yml

Putting protobuf in the cache doesn't actually speed up the builds. [ci skip]
RavenX8/osIROSE-new,RavenX8/osIROSE-new,dev-osrose/osIROSE-new,dev-osrose/osIROSE-new,dev-osrose/osIROSE-new,RavenX8/osIROSE-new