Remove obsolete experimental features

[Neverlord]

Profiling and tracing are both interesting features to have, but they do overlap with metrics (at least the profiling) and were never fully fleshed out. I think we'll revisit both ideas at some point in the future, but the current implementations are too bare-bone.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ab1f6bf) 71.11% compared to head (e7d6ea9) 71.20%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1764      +/-   ##
==========================================
+ Coverage   71.11%   71.20%   +0.08%     
==========================================
  Files         644      641       -3     
  Lines       27429    27379      -50     
  Branches     3009     3006       -3     
==========================================
- Hits        19506    19494      -12     
+ Misses       6209     6168      -41     
- Partials     1714     1717       +3     

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[riemass]

I did a quick grep and the profiler is mentioned in actor_system_config.cpp and the configure script. Otherwise, looks good.

[Neverlord]

I did a quick grep and the profiler is mentioned in actor_system_config.cpp and the configure script. Otherwise, looks good.

Good catch, thanks for double checking!