Remove CMAKE_BUILD_TYPE=Release
Remove CMAKE_BUILD_TYPE=Release

After we have made a default build type Release in da92c1b8a3
we don't need this in AppVeyor anymore.

mpreisler/openscap,mpreisler/openscap,OpenSCAP/openscap,jan-cerny/openscap,redhatrises/openscap,OpenSCAP/openscap,mpreisler/openscap,OpenSCAP/openscap,redhatrises/openscap,redhatrises/openscap,mpreisler/openscap,OpenSCAP/openscap,jan-cerny/openscap,OpenSCAP/openscap,redhatrises/openscap,OpenSCAP/openscap,jan-cerny/openscap,jan-cerny/openscap,mpreisler/openscap,mpreisler/openscap,jan-cerny/openscap,jan-cerny/openscap,redhatrises/openscap,redhatrises/openscap