remove deprecated schema_editor

[braingram]

Now that 2.2.0 is out we can remove schema_editor.

This PR removes the deprecated and unused schema_editor. I don't think this warrants a major version bump (so with this PR the next release would be 2.3.0).

Closes #355

Tasks

• update or add relevant tests
• update relevant docstrings and / or docs/ page
• Does this PR change any API used downstream? (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)
  • run jwst regression tests with this branch installed ("git+https://github.com/<fork>/stdatamodels@<branch>")

news fragment change types...

• changes/<PR#>.feature.rst: new feature
• changes/<PR#>.bugfix.rst: fixes an issue
• changes/<PR#>.doc.rst: documentation change
• changes/<PR#>.removal.rst: deprecation or removal of public API
• changes/<PR#>.misc.rst: infrastructure or miscellaneous change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.17%. Comparing base (788f7bd) to head (b803990).
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #373       +/-   ##
===========================================
+ Coverage   67.59%   78.17%   +10.57%     
===========================================
  Files         115      114        -1     
  Lines        5932     5128      -804     
===========================================
- Hits         4010     4009        -1     
+ Misses       1922     1119      -803     

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[emolter]

Looks good but we should probably do our due diligence and run the JWST regtest suite

[braingram]

Looks good but we should probably do our due diligence and run the JWST regtest suite

Thanks!

Regtests running at: https://github.com/spacetelescope/RegressionTests/actions/runs/12600519431

[braingram]

Regtests show same failures as spacetelescope/jwst#9036 (which is now merged into jwst main).