migrate tests to midje and small kondo cleanup

[gkspranger]

• src/yetibot/core/commands/decode.clj
  • a simple kondo quieting of a supposed "unused import"
• test/yetibot/core/test/commands/decode.clj
  • migration to midje only .. no new tests

[codecov[bot]]

Codecov Report

Merging #187 (80375d9) into master (2986a2d) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #187   +/-   ##
=======================================
  Coverage   53.87%   53.87%           
=======================================
  Files          94       94           
  Lines        4130     4130           
  Branches      208      208           
=======================================
  Hits         2225     2225           
  Misses       1697     1697           
  Partials      208      208           

Impacted Files	Coverage Δ
src/yetibot/core/commands/decode.clj	90.00% <100.00%> (ø)

---

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 2986a2d...80375d9. Read the comment docs.