CLDR-17760 syr, delete obsolete decimalFormats/currencyFormats without numberSystem

[pedberg-icu]

CLDR-17760

• This PR completes the ticket.

In syr, delete the obsolete <decimalFormats> and <currencyFormats> elements that do not have a numberSystem attribute at all (these probably date from when the syr data was first added in xml to the seed directory years ago). These do not show up in Survey Tool and (I think) are ignored by ICU code. The current version of these elements does have a numberSystem attribute, and syr does also have <decimalFormats> and <currencyFormats> elements (and also <percentFormats>) with numberSystem="latn"; these are the ones that appear in Survey Tool and get used by the code.

ALLOW_MANY_COMMITS=true

[AEApple]

How does deprecation of structure work in other languages? I'm assuming that at some point in the past there was only one script possible per locale and there was no option to have a number format per language.

Either way if the data is unconfirmed that in theory no one is likely to be using it, but I'd like to understand the larger context because I've seen unconfirmed data elsewhere in locales that aren't vetted by any organization and are unlikely to be vetted by guest vetters either.