remove and clean up GeneAssociations alias

[exaexa]

• it was too similar to GeneAssociationsDNF
• Vector{Isozyme} actually explains the contents very well, and no complexity is hidden

[codecov]

Codecov Report

Base: 88.44% // Head: 88.44% // No change to project coverage 👍

Coverage data is based on head (9f57b0b) compared to base (8484eb3).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             next     #753   +/-   ##
=======================================
  Coverage   88.44%   88.44%           
=======================================
  Files          88       88           
  Lines        2095     2095           
=======================================
  Hits         1853     1853           
  Misses        242      242           

Impacted Files	Coverage Δ
src/types/GeneAssociations.jl	100.00% <ø> (ø)
src/types/Reaction.jl	100.00% <ø> (ø)
src/types/misc/gene_associations.jl	95.34% <0.00%> (ø)
src/types/models/MatrixModel.jl	96.66% <ø> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[stelmo]

I agree!