Remove obsolete APIs

[tobias-tengler]

Removes APIs that were marked as obsolete in <= v12.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (6965960) 78.98% compared to head (117faa7) 78.50%.
Report is 57 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6657      +/-   ##
==========================================
- Coverage   78.98%   78.50%   -0.49%     
==========================================
  Files        2903     2556     -347     
  Lines      139771   127989   -11782     
==========================================
- Hits       110397   100474    -9923     
+ Misses      29374    27515    -1859     

Flag	Coverage Δ
unittests	78.50% <94.44%> (-0.49%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...e/src/CookieCrumble/Extensions/WriterExtensions.cs	100.00% <ø> (ø)
...CookieCrumble/src/CookieCrumble/TestEnvironment.cs	0.00% <ø> (ø)
...polloFederationRequestExecutorBuilderExtensions.cs	66.66% <100.00%> (ø)
...ensions/ApolloFederationSchemaBuilderExtensions.cs	86.66% <ø> (ø)
.../src/ApolloFederation/FederationTypeInterceptor.cs	100.00% <100.00%> (ø)
...ion/src/ApolloFederation/Helpers/ArgumentParser.cs	68.65% <100.00%> (+0.47%)	⬆️
...rc/AspNetCore.CommandLine/Command/ExportCommand.cs	100.00% <100.00%> (ø)
...tChocolateAspNetCoreServiceCollectionExtensions.cs	66.66% <ø> (ø)
...rc/AspNetCore/Extensions/HttpResponseExtensions.cs	26.31% <ø> (+4.57%)	⬆️
...olate/AspNetCore/src/AspNetCore/HeaderUtilities.cs	84.04% <ø> (+3.19%)	⬆️
... and 10 more

... and 667 files with indirect coverage changes

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[michaelstaib]

Thank you tobias!