Remove generator_handles_variants more.
Remove generator_handles_variants more.

This should have been part of r1755. No intended behavior change.

TBR=scottmg@chromium.org

Review URL: https://codereview.chromium.org/27424002
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google