SyncID3toInfo when writing Wav shoud remove fields that are in INFO not ID3

So info INFO tag has an artist field but ID3 tag does not then we should delete it as user has made clear that ID3 is the master, currently we only replace values when the value of ID3 field is different to the INFO field.

Also applies if using SyncInfoToID3 but restrict to only the fields that can be added to INFO tag as ID3 supports many more fields than INFO tag.