[enhancement] do not report deprecation usage messages in functions which are deprecated themselves

[jurgenvinju]

Is your feature request related to a problem? Please describe.

The standard library currently produces 21 warnings like this:

[WARNING] /util/Reflective.rsc:160:015: Deprecated function: Function will be moved to Rascal compiler

All of these are uses of functions which are deprecated by functions which are deprecated themselves.

• since we will be removing these functions entirely, the warning about what happens in their bodies is not useful
• the implicit message that we have risky code that users should be warned about in the standard library isn't true.
• the warning can not be solved by re-implementing the bodies of these functions better, and also it would be a waste.

So perhaps it would be good to filter or not produce these warnings in this specific circumstance of being a deprecated function that uses deprecated functions.