Deprecate LocalizedStringAttributeValue?

[Rod Widdowson]

I was just looking at the classes that extend StringAttributeValue and happened upon LocalizedStringAttributeValue[1].

I see no use of it at all except in the tests.  Can anyone think of a good reason to not deprecate it?

[1]
https://git.shibboleth.net/view/?p=java-identity-provider.git;a=blob_plain;f=idp-attribute-api/src/main/java/net/shibboleth/idp/attr
ibute/LocalizedStringAttributeValue.java;