Remove nested filters in NestedCellMorphologyFilter

[GianlucaFicarelli]

Remove nested filters used in emodel.exemplar_morphology and memodel.morphology, since they aren't used and they cannot work unless the query is modified by adding joined tables.

Note also that the filters aren't very useful for emodel.exemplar_morphology since it's returned by the read_many endpoints in:

• entitycore/app/schemas/emodel.py

  Line 71 in 2259a9c

  exemplar_morphology: ExemplarMorphology

and exemplar_morphology is a subclass of CellMorphologyBase, that doesn't contain brain_region, subject, mtype:

entitycore/app/schemas/cell_morphology.py

Line 17 in 2259a9c

class CellMorphologyBase(BaseModel, NameDescriptionMixin):

Instead, memodel.morphology defined in:

• entitycore/app/schemas/me_model.py

  Line 67 in 2259a9c

  morphology: CellMorphologyRead

is a subclass of CellMorphologyRead and it contains all the nested brain_region, subject, mtype, but these values aren't shown in the list view in the UI

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
pytest	97.91% <100.00%> (-0.01%)	⬇️

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Files with missing lines	Coverage Δ
app/filters/cell_morphology.py	100.00% <100.00%> (ø)

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