Fix ineffectual assignments

[muesli]

• Don't assign variables we don't end up using
• Added missing error check in test

[codecov-io]

Codecov Report

Merging #111 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #111   +/-   ##
=======================================
  Coverage   80.02%   80.02%           
=======================================
  Files          29       29           
  Lines        1437     1437           
=======================================
  Hits         1150     1150           
  Misses        200      200           
  Partials       87       87

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 8a48862...7a3f8c1. Read the comment docs.

[mattn]

Thank you