I was wondering if scala had an equivalent to java\'s @SuppressWarnings that can be applied to a function or whatever to ignore any deprecation warnings[1] that function emi
No, and an enhancement request [1] for such a feature was closed as wontfix.
I agree it would be useful. I expect that the Scala core team aren't against the idea, but they have finite resources and many higher priorities.
update: this feature was eventually implemented in scala 2.13.2 release on 2020-04-22, see this answer
[1] https://issues.scala-lang.org/browse/SI-1781