Remove signature tests from dune runtest

[WardBrian]

Submission Checklist

• [x] Run unit tests
• Documentation
  • [ ] If a user-facing facing change was made, the documentation PR is here:
  • [x] OR, no user-facing changes were made

Release notes

Removed function signatures from the items tested by dune runtest - these are instead tested by compilation in Jenkins

Copyright and Licensing

By submitting this pull request, the copyright holder is agreeing to license the submitted work under the BSD 3-clause license (https://opensource.org/licenses/BSD-3-Clause)

[WardBrian]

My plan is to 1) let tests pass on this 2) Add a bogus signature to one of these files, make sure that tests fail in this case 3) Remove that and merge

@rok-cesnovar

[rok-cesnovar]

Sounds like a great plan to me!