chore!: remove old positional compat

[flying-sheep]

• Closes #
• Tests included or not required because:

• Release notes not necessary because:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.94%. Comparing base (e8dc05d) to head (c4ca288).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3984      +/-   ##
==========================================
- Coverage   78.28%   77.94%   -0.34%     
==========================================
  Files         117      117              
  Lines       12635    12506     -129     
==========================================
- Hits         9891     9748     -143     
- Misses       2744     2758      +14     

Flag	Coverage Δ
hatch-test.low-vers	77.22% <100.00%> (-0.35%)	⬇️
hatch-test.pre	76.88% <100.00%> (-0.35%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/scanpy/_compat.py	70.93% <100.00%> (-0.67%)	⬇️
src/scanpy/_settings/__init__.py	86.03% <100.00%> (-0.06%)	⬇️
src/scanpy/datasets/_datasets.py	90.90% <100.00%> (-0.08%)	⬇️
src/scanpy/external/exporting.py	12.28% <ø> (-1.11%)	⬇️
src/scanpy/external/pl.py	30.00% <100.00%> (-1.53%)	⬇️
src/scanpy/external/pp/_bbknn.py	45.45% <ø> (-8.40%)	⬇️
src/scanpy/external/pp/_dca.py	40.00% <ø> (-10.00%)	⬇️
src/scanpy/external/pp/_harmony_integrate.py	42.85% <ø> (-7.15%)	⬇️
src/scanpy/external/pp/_hashsolo.py	88.03% <ø> (-0.21%)	⬇️
src/scanpy/external/pp/_scanorama_integrate.py	22.22% <ø> (-5.37%)	⬇️
... and 43 more

... and 1 file with indirect coverage changes

[ilan-gold]

Is this Scanpy 2.0 or you want to do this right now?

[flying-sheep]

right now, these all existed for some time.

there’s going to be enough complexity around parameters in the time leading up to 2.0, I won’t drag around years old deprecations.