Getting rid of obsolete overlays

[Nesguy]

Is there any reason to use the scanline overlays instead of just using the “scanline-fract” shader? I’m thinking it might be better to get rid of these overlays since they’re harder to use.

[hunterk]

Many platforms we support don’t have shader pipelines at all, so scanline overlays are the only option.

[Nesguy]

Ah, that makes sense

In that case, this may be of use to somebody- some thicker scanlines at 5x scale.