* Allow multiple removal of unused suppress warnings tokens

- add new UnusedSuppressWarningsCleanUp and
  UnusedSuppressWarningsFixCore to create FixCorrectionProposals to
  remove a single unused warning token, remove all unused warning
  tokens with a particular name, and remove all unused warning
  tokens
- modify SuppressWarningsBaseSubProcessor to create up to 3 of the
  above fix correction proposals (assuming there are more than 1
  problem flagged for a particular warning token and more than 1
  warning token flagged in problems
- add new test to CleanUpTest1d8
- fixes #1668