fix: remove unused parameters in co_occurence

[selmanozleyen]

fixes: #1110 and #1048 .

n_splits usage was removed here 32789ae

[flying-sheep]

this will break code that uses these parameters – sure they are unused, but you could warn first that they do nothing and will be removed, and then remove them later,

[codecov]

Codecov Report

❌ Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.96%. Comparing base (240dcfe) to head (7c4fec7).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/squidpy/_utils.py	72.72%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1121   +/-   ##
=======================================
  Coverage   72.96%   72.96%           
=======================================
  Files          38       38           
  Lines        6484     6496   +12     
  Branches     1151     1153    +2     
=======================================
+ Hits         4731     4740    +9     
- Misses       1270     1272    +2     
- Partials      483      484    +1     

Files with missing lines	Coverage Δ
src/squidpy/gr/_ppatterns.py	78.01% <100.00%> (+0.09%)	⬆️
src/squidpy/_utils.py	57.21% <72.72%> (+0.96%)	⬆️

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[timtreis]

lgtm