Remove OpenTelemetry.SemanticConventions project

[reyang]

Follow up #5531 (comment).
If users find the project useful, might be a good fit for the opentelemetry-dotnet-contrib repo.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.54%. Comparing base (6250307) to head (94ab88d).
Report is 179 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5539      +/-   ##
==========================================
+ Coverage   83.38%   85.54%   +2.16%     
==========================================
  Files         297      289       -8     
  Lines       12531    12605      +74     
==========================================
+ Hits        10449    10783     +334     
+ Misses       2082     1822     -260     

Flag	Coverage Δ
unittests	?
unittests-Solution-Experimental	85.54% <ø> (?)
unittests-Solution-Stable	85.51% <ø> (?)

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see 77 files with indirect coverage changes

[alanwest]

👍 I suggested we drop this project in the SIG meeting. Almost pushed up my branch and opened this PR... guess you beat me to it 😆

[alanwest]

I just unlisted the package from NuGet... should stop showing in search results shortly.

[CodeBlanch]

What is the urgency here? What we talked about on the SIG was we would land #5531 and then do this as a follow-up. Now I have to go sort out conflicts. Are we practicing good professional courtesy? What sort of collaborative environment do we want to foster?

[reyang]

What is the urgency here? What we talked about on the SIG was we would land #5531 and then do this as a follow-up. Now I have to go sort out conflicts. Are we practicing good professional courtesy? What sort of collaborative environment do we want to foster?

Are these questions for me?

[reyang]

What are the real motivations behind this change?

Maintenance - this package should not come from the opentelemetry-dotnet repository, opentelemetry-dotnet is only intended for core components such as the API / SDK / plugins required by the specification / infrastructure components.

If there is high demand, opentelemetry-dotnet-contrib is the right place #5539 (comment).