Cargo.toml: Remove non standard profile

[oech3]

release has lto=true. Undocumented profile. release{,-fast} is enough.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.15%. Comparing base (1757501) to head (77e1abd).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #226   +/-   ##
=======================================
  Coverage   82.15%   82.15%           
=======================================
  Files          13       13           
  Lines        5324     5324           
  Branches      293      293           
=======================================
  Hits         4374     4374           
  Misses        948      948           
  Partials        2        2           

Flag	Coverage Δ
macos_latest	82.59% <ø> (ø)
ubuntu_latest	82.71% <ø> (ø)
windows_latest	0.00% <ø> (ø)

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[codspeed-hq]

CodSpeed Performance Report

Merging #226 will not alter performance

_{Comparing oech3:patch-1 (77e1abd) with main (1757501)}

Summary

✅ 11 untouched

[oech3]

What?!

[sylvestre]

What?!

it is using instrumentation, not raw measurement, it is expected :)