Remove all repro/proxy code

[Porges]

Summary of the Pull Request

What is this about?

PR Checklist

• [ ] Applies to work item: #xxx
• [ ] CLA signed. If not, go over here and sign the CLI.
• [ ] Tests added/passed
• [ ] Requires documentation to be updated
• [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Info on Pull Request

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Validation Steps Performed

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[codecov-commenter]

Codecov Report

Merging #3500 (ec72713) into main (896329d) will increase coverage by 1.75%. Report is 1 commits behind head on main. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3500      +/-   ##
==========================================
+ Coverage   39.32%   41.07%   +1.75%     
==========================================
  Files         299      285      -14     
  Lines       36270    34312    -1958     
==========================================
- Hits        14264    14095     -169     
+ Misses      22006    20217    -1789     

Files Changed	Coverage Δ
.../ApiService/ApiService/Functions/InstanceConfig.cs	0.00% <ø> (ø)
.../ApiService/ApiService/Functions/TimerRetention.cs	0.00% <ø> (ø)
src/ApiService/ApiService/OneFuzzTypes/Enums.cs	26.76% <ø> (-5.64%)	:arrow_down:
src/ApiService/ApiService/OneFuzzTypes/Events.cs	72.44% <ø> (-1.62%)	:arrow_down:
src/ApiService/ApiService/OneFuzzTypes/Requests.cs	62.66% <ø> (+3.74%)	:arrow_up:
...rc/ApiService/ApiService/OneFuzzTypes/Responses.cs	80.00% <ø> (+2.33%)	:arrow_up:
src/ApiService/ApiService/Program.cs	12.24% <ø> (+0.48%)	:arrow_up:
src/ApiService/ApiService/onefuzzlib/Extension.cs	0.00% <ø> (ø)
...ApiService/ApiService/onefuzzlib/OnefuzzContext.cs	0.00% <ø> (ø)
...ApiService/ApiService/onefuzzlib/TaskOperations.cs	33.33% <ø> (+1.96%)	:arrow_up:
... and 4 more

... and 5 files with indirect coverage changes

[Porges]

Closing off test