Remove crowding (obsolete via SMOMENT)

[stelmo]

Crowding is obsolete since the inclusion of smoment (just add random or equal weights to all enzymes for the same effect).

Moreover, it should not be a modification.

[codecov[bot]]

Codecov Report

Base: 89.64% // Head: 89.57% // Decreases project coverage by -0.07% :warning:

Coverage data is based on head (9c10454) compared to base (4ff7779). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## next #725 +/- ## ========================================== - Coverage 89.64% 89.57% -0.08% ========================================== Files 81 80 -1 Lines 1913 1900 -13 ========================================== - Hits 1715 1702 -13 Misses 198 198 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=LCSB-BioCore). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=LCSB-BioCore)

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[stelmo]

/format

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[stelmo]

/format

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