Remove unnecessary test after pastasoss inclusion

[tapastro]

This PR addresses a failure in regression testing after our 1.16.0 release, coupled with the migration of pastasoss reference files to CRDS OPS. This test was introduced to ensure the prior algorithm could navigate an internal failure of the transform solver - that solver algorithm is now gone, and the new algorithm is robust to the previous issue (i.e. it does not care what pixel values exist). It is no longer relevant and can be removed.

Tasks

• request a review from someone specific, to avoid making the maintainers review every PR
• add a build milestone, i.e. Build 11.3 (use the latest build if not sure)
• Does this PR change user-facing code / API? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see below for change types)
  • update or add relevant tests
  • update relevant docstrings and / or docs/ page
  • start a regression test and include a link to the running job (click here for instructions)
    • Do truth files need to be updated ("okified")?
      • after the reviewer has approved these changes, run okify_regtests to update the truth files
• if a JIRA ticket exists, make sure it is resolved properly

news fragment change types...

- ``changes/<PR#>.general.rst``: infrastructure or miscellaneous change
- ``changes/<PR#>.docs.rst``
- ``changes/<PR#>.stpipe.rst``
- ``changes/<PR#>.datamodels.rst``
- ``changes/<PR#>.scripts.rst``
- ``changes/<PR#>.fits_generator.rst``
- ``changes/<PR#>.set_telescope_pointing.rst``

## stage 1
- ``changes/<PR#>.group_scale.rst``
- ``changes/<PR#>.dq_init.rst``
- ``changes/<PR#>.emicorr.rst``
- ``changes/<PR#>.saturation.rst``
- ``changes/<PR#>.ipc.rst``
- ``changes/<PR#>.firstframe.rst``
- ``changes/<PR#>.lastframe.rst``
- ``changes/<PR#>.reset.rst``
- ``changes/<PR#>.superbias.rst``
- ``changes/<PR#>.refpix.rst``
- ``changes/<PR#>.linearity.rst``
- ``changes/<PR#>.rscd.rst``
- ``changes/<PR#>.persistence.rst``
- ``changes/<PR#>.dark_current.rst``
- ``changes/<PR#>.charge_migration.rst``
- ``changes/<PR#>.jump.rst``
- ``changes/<PR#>.ramp_fitting.rst``
- ``changes/<PR#>.gain_scale.rst``

## stage 2
- ``changes/<PR#>.assign_wcs.rst``
- ``changes/<PR#>.msaflagopen.rst``
- ``changes/<PR#>.nsclean.rst``
- ``changes/<PR#>.imprint.rst``
- ``changes/<PR#>.background.rst``
- ``changes/<PR#>.extract_2d.rst``
- ``changes/<PR#>.master_background.rst``
- ``changes/<PR#>.wavecorr.rst``
- ``changes/<PR#>.srctype.rst``
- ``changes/<PR#>.straylight.rst``
- ``changes/<PR#>.wfss_contam.rst``
- ``changes/<PR#>.flatfield.rst``
- ``changes/<PR#>.fringe.rst``
- ``changes/<PR#>.pathloss.rst``
- ``changes/<PR#>.barshadow.rst``
- ``changes/<PR#>.photom.rst``
- ``changes/<PR#>.pixel_replace.rst``
- ``changes/<PR#>.resample_spec.rst``
- ``changes/<PR#>.residual_fringe.rst``
- ``changes/<PR#>.cube_build.rst``
- ``changes/<PR#>.extract_1d.rst``
- ``changes/<PR#>.resample.rst``

## stage 3
- ``changes/<PR#>.assign_mtwcs.rst``
- ``changes/<PR#>.mrs_imatch.rst``
- ``changes/<PR#>.tweakreg.rst``
- ``changes/<PR#>.skymatch.rst``
- ``changes/<PR#>.exp_to_source.rst``
- ``changes/<PR#>.outlier_detection.rst``
- ``changes/<PR#>.tso_photometry.rst``
- ``changes/<PR#>.stack_refs.rst``
- ``changes/<PR#>.align_refs.rst``
- ``changes/<PR#>.klip.rst``
- ``changes/<PR#>.spectral_leak.rst``
- ``changes/<PR#>.source_catalog.rst``
- ``changes/<PR#>.combine_1d.rst``
- ``changes/<PR#>.ami.rst``

## other
- ``changes/<PR#>.wfs_combine.rst``
- ``changes/<PR#>.white_light.rst``
- ``changes/<PR#>.cube_skymatch.rst``
- ``changes/<PR#>.engdb_tools.rst``
- ``changes/<PR#>.guider_cds.rst``

[emolter]

LGTM, yeah, this test should be specific to the old solver

[melanieclarke]

LGTM too!

[tapastro]

First test run exposed an issue with the rmap delivered in jwst_1289.pmap, but the one in the latest context works as expected: https://plwishmaster.stsci.edu:8081/job/RT/job/JWST-Developers-Pull-Requests/1746/

One failure, expected - the test was using the removed parameter soss_transform and therefore hadn't generated an output to okify until now. Merging!