fix warnings in -default +ring build

[japaric]

I found these while running cargo c -p rustls --no-default-features --features ring to test some WIP work

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (26ec868) 95.71% compared to head (1353f5c) 95.71%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1627   +/-   ##
=======================================
  Coverage   95.71%   95.71%           
=======================================
  Files          78       78           
  Lines       16071    16071           
=======================================
  Hits        15382    15382           
  Misses        689      689           

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[cpu]

Nice catch. Thanks for the fix.

It looks like the feature powerset task in the daily-tests.yml has been seeing these warnings, but not treating them as errors.

Would you mind updating that job to use --deny warnings to prevent regression?

[djc]

We should also bump the noise threshold on the benchmark jobs, especially for aws-lc-rs.

[japaric]

@cpu done. (it doesn't seem like cargo hack accepts -- --deny warnings like cargo clippy does so I used RUSTFLAGS)

[cpu]

Great, ty