Clean up VCSRepoAlg

[fthomas]

No description provided.

[codecov]

Codecov Report

Merging #2017 (1939b3b) into master (e5dd20b) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2017      +/-   ##
==========================================
- Coverage   78.59%   78.58%   -0.01%     
==========================================
  Files         131      131              
  Lines        2252     2251       -1     
  Branches       52       54       +2     
==========================================
- Hits         1770     1769       -1     
  Misses        482      482              

Impacted Files	Coverage Δ
...n/scala/org/scalasteward/core/vcs/VCSRepoAlg.scala	100.00% <100.00%> (ø)

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