Revert "Send user agent info as a new feature extension to server"

[machavan]

Reverts #2793

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.30%. Comparing base (6788aa3) to head (222d900).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2833      +/-   ##
============================================
- Coverage     56.33%   56.30%   -0.03%     
+ Complexity     4526     4515      -11     
============================================
  Files           151      151              
  Lines         34478    34431      -47     
  Branches       5745     5736       -9     
============================================
- Hits          19423    19388      -35     
+ Misses        12421    12411      -10     
+ Partials       2634     2632       -2     

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