DM-37534: Remove deprecated code

[Fireye04]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Base: 80.70% // Head: 80.56% // Decreases project coverage by -0.15% ⚠️

Coverage data is based on head (3a71cc3) compared to base (9a0c4f7).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #298      +/-   ##
==========================================
- Coverage   80.70%   80.56%   -0.15%     
==========================================
  Files          58       57       -1     
  Lines        6345     6304      -41     
  Branches     1179     1174       -5     
==========================================
- Hits         5121     5079      -42     
  Misses        981      981              
- Partials      243      244       +1     

Impacted Files	Coverage Δ
python/lsst/pipe/base/__init__.py	100.00% <ø> (ø)
python/lsst/pipe/base/_dataset_handle.py	100.00% <ø> (ø)
python/lsst/pipe/base/_task_metadata.py	96.60% <ø> (-1.58%)	⬇️
python/lsst/pipe/base/pipeline.py	62.81% <0.00%> (-0.09%)	⬇️
python/lsst/pipe/base/pipelineIR.py	86.27% <0.00%> (ø)
tests/test_taskmetadata.py	97.43% <ø> (-0.22%)	⬇️
python/lsst/pipe/base/graph/graph.py	81.62% <0.00%> (ø)

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[timj]

Looks great.