[Chapel Merge] Remove stale test files

Branch: refs/heads/master
Revision: f672d58
Author: lydia-duncan
Log Message:

Merge pull request #16843 from cassella/remove-stale-test-files

Remove stale test files
[contributed by @cassella, reviewed by Lydia]

Remove test files that are no longer used:

test/param/ferguson/signed-zeros.bad
test/types/complex/bradc/negateimaginary3.bad
test/types/complex/bradc/negativeimaginaryliteral.bad
test/library/standard/FileSystem/chmod/chmod.rwto.good
test/library/standard/FileSystem/chmod/chmod.to.good

The individual commits describe when the files became unused.

Modified Files:
R test/library/standard/FileSystem/chmod/chmod.rwto.good
R test/library/standard/FileSystem/chmod/chmod.to.good
R test/param/ferguson/signed-zeros.bad
R test/types/complex/bradc/negateimaginary3.bad
R test/types/complex/bradc/negativeimaginaryliteral.bad

Compare: https://github.com/chapel-lang/chapel/compare/d78a957f63c2...f672d58ed529