ard.lua: Cleanup Ard.iter_formats
ard.lua: Cleanup Ard.iter_formats

Realign, remove webX extraction which is now done in Ard.quality_from,
make the for loop more compact.

Signed-off-by: Toni Gundogdu <eac2284b3c43676907b96f08de9d3d52d5df0361@gmail.com>

alech/libquvi-scripts,DangerCove/libquvi-scripts,legatvs/libquvi-scripts,legatvs/libquvi-scripts,DangerCove/libquvi-scripts,alech/libquvi-scripts