Refactor: clean model settings module code

[syphax-bouazzouni]

Changes

• remove old file no more used (https://github.com/ontoportal-lirmm/goo/commit/c042c19f0268c17516b7b3d4df05597936d6256d)
• extract attribute settings module from the model settings module (https://github.com/ontoportal-lirmm/goo/commit/dd08761d4443b312e11e6f1d43261368403abdef)
• remove the inmutable feature as deprecated and not used (https://github.com/ontoportal-lirmm/goo/commit/5c87eabae46b767cf6b7d536f9d863a35cd4efa0)
• rename callbacks method names (https://github.com/ontoportal-lirmm/goo/commit/55f5c11142d8a266ce6ce7e4ffc67147722f00b8)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:exclamation: No coverage uploaded for pull request base (development@f1a452e). Click here to learn what that means.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #52 +/- ## ============================================== Coverage ? 86.19% ============================================== Files ? 39 Lines ? 2672 Branches ? 0 ============================================== Hits ? 2303 Misses ? 369 Partials ? 0 ```

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