Fix: remove nonassociated genes

[JHL-452b]

Main improvements in this PR:

As proposed in #963 :

• Remove ENSG00000102595(UGGT2), ENSG00000136731(UGGT1), ENSG00000147162(OGT) and ENSG00000175711(B3GNTL1) from the model as they are not connected with any reaction;
• Add ENSG00000165449(SLC16A9) to the GPR of MAR04992;

I hereby confirm that I have:

• Tested my code on my own computer for running the model
• Selected develop as a target branch
• Any removed reactions and metabolites have been moved to the corresponding deprecated identifier lists

[github-actions]

This PR has been automatically tested with GH Actions. Here is the output of the MACAW test:

Starting dead-end test...
 - Found 1523 dead-end metabolites.
 - Found 1328 reactions incapable of sustaining steady-state fluxes in either direction due to these dead-ends.
 - Found 1975 reversible reactions that can only carry steady-state fluxes in a single direction due to dead-ends.
Starting duplicate test...
 - Skipping redox duplicates because no redox_pairs and/or proton_ids were provided.
 - Found 447 reactions that were some type of duplicate:
   - 0 were completely identical to at least one other reaction.
   - 13 involve the same metabolites but go in the opposite direction or have the opposite reversibility as at least one other reaction.
   - 447 involve the same metabolites but with different coefficients as at least one other reaction.

This and a more detailed output from MACAW are also committed to data/macawResults/.

Note: In the case of multiple test runs, this post will be edited.