Revert "AppVeyor: Install Ruby from chocolatey."
Revert "AppVeyor: Install Ruby from chocolatey."

This reverts commit e01ed673e17769cb3cc78d5cd8ed9d0740112095.

msteinbeck/tinyspline,retuxx/tinyspline,msteinbeck/tinyspline,msteinbeck/tinyspline,msteinbeck/tinyspline,msteinbeck/tinyspline,msteinbeck/tinyspline,msteinbeck/tinyspline,retuxx/tinyspline,msteinbeck/tinyspline,retuxx/tinyspline