Messages no longer required

How could I know automatically if a message is no longer required?: It will no longer show up as translatable on Special:Translate
Is there a list of deprecated system messages?: No, there isn't, and there is no need for it.
Is there a bot which cleans deprecated messages?: No, there isn't, and there is no need for it.

It think there should be a list of deprecated message in order to keep translatewiki cleaned from unnecessary messages... Anyway, thank you! --★ → A ir on

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This is a recurring subject. Those messages are not in the way, and there is no need to clean them. Please do not take any unilateral action on this non-issue.

Please also fix your horrible and broken signature.

Siebrand‎

The thread extension breaks it. So I have to insert it manually. Is it a bug? ★ → A ir on

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Could be. You could also make your signature less shouty.

Siebrand‎