fix: remove LDHAL6A from MAR11479 for GPR consistency with MAR11476

[edkerk]

Main improvements in this PR:

Found while reviewing #528. MAR11476 and MAR11479 are the same promiscuous lactate dehydrogenase side-reaction on adjacent branched-chain 2-oxo acids. The GPR curation in #847 / #885 removed LDHAL6A (ENSG00000166800) from MAR11476 as not relevant to the reaction, but left it on the identical MAR11479.

• Remove LDHAL6A (ENSG00000166800) from the GPR of MAR11479, so it matches MAR11476 (LDHB, LDHA, LDHC, LDHD, LDHAL6B).

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 1384 dead-end metabolites.
 - Found 1141 reactions incapable of sustaining steady-state fluxes in either direction due to these dead-ends.
 - Found 1369 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 377 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.
   - 377 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/testResults/.

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