Remove csv from docs Project.toml

[Mattriks]

Fixes #1509

• I've built the docs and confirmed these changes don't cause new errors

[codecov-io]

Codecov Report

Merging #1510 (c1ae391) into master (c60cc91) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1510   +/-   ##
=======================================
  Coverage   89.72%   89.72%           
=======================================
  Files          39       39           
  Lines        4625     4625           
=======================================
  Hits         4150     4150           
  Misses        475      475           

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