dcou test only code in streamer

[alexpyattaev]

Problem

streamer/src/nonblocking/recvmmsg.rs is not used outside of unittests but is exposed as pub fn.

Summary of Changes

• DCOU a module we do not use outside of tests.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.2%. Comparing base (8e575e2) to head (92e5cee).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #6936     +/-   ##
=========================================
- Coverage    83.2%    83.2%   -0.1%     
=========================================
  Files         856      856             
  Lines      377966   377966             
=========================================
- Hits       314798   314779     -19     
- Misses      63168    63187     +19     

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[vadorovsky]

Good catch. Feel free to merge, but... I'm even wondering if we should just 🪓 it. I suppose that this whole module is just a leftover of someone's attempt to make our recv_mssg work with tokio? But it doesn't seem to be used that way anywhere.

We could always restore this code if needed.

[alexpyattaev]

Well we dcou it first, this gives us the freedom to figure out when and how we want to axe it for good. After all, it is still used in a bunch of tests, so those would need to be updated.