Remove useless test framework warnings

[ariard]

No description provided.

[codecov]

Codecov Report

Merging #384 into master will decrease coverage by 0.19%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #384     +/-   ##
========================================
- Coverage   87.49%   87.3%   -0.2%     
========================================
  Files          29      29             
  Lines       15791   15818     +27     
========================================
- Hits        13817   13810      -7     
- Misses       1974    2008     +34

Impacted Files	Coverage Δ
src/ln/functional_tests.rs	96.08% <ø> (-0.24%)	⬇️
src/ln/channelmanager.rs	81.1% <0%> (-0.48%)	⬇️
src/ln/channelmonitor.rs	84.89% <0%> (-0.46%)	⬇️
src/ln/peer_channel_encryptor.rs	90.83% <0%> (-0.19%)	⬇️
src/ln/channel.rs	84.57% <0%> (-0.13%)	⬇️
src/ln/functional_test_utils.rs	94.37% <0%> (-0.12%)	⬇️
src/ln/peer_handler.rs	31.72% <0%> (-0.1%)	⬇️
src/ln/chanmon_update_fail_tests.rs	96.92% <0%> (-0.09%)	⬇️
src/ln/msgs.rs	82.39% <0%> (+0.01%)	⬆️
... and 1 more

---

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 39b562e...230b0e1. Read the comment docs.