removing rnd reuse logic (disabled by default)

[emmacware]

No description provided.

[slayoo]

OK, in the 2D kinematic setup, the reuse logic is enabled by default:

PySDM/examples/PySDM_examples/Morrison_and_Grabowski_2007/common.py

Line 32 in 20c8340

self.coalescence_optimized_random = True

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.46%. Comparing base (20c8340) to head (94ce24c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1642      +/-   ##
==========================================
- Coverage   85.53%   85.46%   -0.08%     
==========================================
  Files         396      394       -2     
  Lines        9601     9541      -60     
==========================================
- Hits         8212     8154      -58     
+ Misses       1389     1387       -2     

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[slayoo]

IIUC, with the reuse disabled, we are shuffling all n_sd numbers regardless of how many are actually needed in a given substep. So, I'd suggest that before removing the reuse logic, we implement a scheme to alter the amount of shuffled numbers depending on how many are actually needed in a given substep