Remove deprecated features from search

[jotare]

Description

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How was this PR tested?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.08%. Comparing base (50d375e) to head (a60f53d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2618      +/-   ##
==========================================
- Coverage   86.12%   86.08%   -0.05%     
==========================================
  Files         377      377              
  Lines       23792    23765      -27     
==========================================
- Hits        20492    20457      -35     
- Misses       3300     3308       +8     

Flag	Coverage Δ
nucliadb	73.61% <ø> (ø)
nucliadb-ingest	28.51% <ø> (ø)
nucliadb-reader	24.54% <ø> (ø)
nucliadb-search	37.61% <ø> (ø)
nucliadb-standalone	46.61% <ø> (ø)
nucliadb-train	44.74% <ø> (ø)
nucliadb-writer	39.13% <ø> (-0.01%)	⬇️
nucliadb_dataset	55.45% <ø> (ø)
nucliadb_models	84.82% <ø> (-0.29%)	⬇️
nucliadb_sdk	80.11% <ø> (ø)
nucliadb_sidecar	87.24% <ø> (-1.79%)	⬇️
nucliadb_telemetry	86.55% <ø> (ø)
nucliadb_utils	84.36% <ø> (ø)

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