remove deprecated_properties

[braingram]

deprecated_properties appears to have been added to allow moving "properties" within a schema:
#86

However the feature seems to be unused with no schemas containing deprecated_properties.

This PR removes the unused feature.

Checklist

• added entry in CHANGES.rst (either in Bug Fixes or Changes to API)
• updated relevant tests
• updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.22%. Comparing base (4d7c3a6) to head (2c3f076).
Report is 58 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #303      +/-   ##
==========================================
+ Coverage   64.84%   66.22%   +1.38%     
==========================================
  Files         103      101       -2     
  Lines        5694     5403     -291     
==========================================
- Hits         3692     3578     -114     
+ Misses       2002     1825     -177     

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[hbushouse]

Code changes look fine to me. Have you run a full regression test of jwst against this PR?

[braingram]

Code changes look fine to me. Have you run a full regression test of jwst against this PR?

Thanks for taking a look! I haven't run the regtests and will update this PR when I can queue them up.

[braingram]

Regression tests running at:
https://github.com/spacetelescope/RegressionTests/actions/runs/9484628685
As this is a GA run the expected failures (due to jenkins RHEL7 issues) can be seen:
https://github.com/spacetelescope/RegressionTests/actions/runs/9457265856 (this run is just prior to the drizpars changes)

[braingram]

Regression tests ran with only the expected failures due to system differences.

[hbushouse]

Looks good.