Remove require file from test

[albheim]

Remove require file in test folder.

[JuliaControlBot]

This is an automated message.
Plots were compared to references. No changes were detected.

[codecov]

Codecov Report

Merging #404 (3f77aab) into master (2fd813d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #404   +/-   ##
=======================================
  Coverage   82.40%   82.40%           
=======================================
  Files          31       31           
  Lines        2824     2824           
=======================================
  Hits         2327     2327           
  Misses        497      497           

---

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 2fd813d...3f77aab. Read the comment docs.