Clean Ruby 3.x Gemfiles

[sarahchen6]

What does this PR do?
This PR removes if statements and alphabetizes ruby-3.x.gemfiles.

Motivation:
Since gemfiles are no longer symlinked, we can begin removing if statements and generally cleaning each file.

Change log entry
None.

Additional Notes:
N/A

How to test the change?
Green CI.

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-12-11 16:04:12

Comparing candidate commit ee5f6e1 in PR branch sarahchen6/clean-3.x-gemfiles with baseline commit 1be0c46 in branch master.

Found 1 performance improvements and 0 performance regressions! Performance is the same for 30 metrics, 2 unstable metrics.

scenario:tracing - Propagation - Datadog

• 🟩 throughput [+3324.010op/s; +3408.695op/s] or [+11.099%; +11.382%]

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.76%. Comparing base (1be0c46) to head (ee5f6e1).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4211      +/-   ##
==========================================
- Coverage   97.76%   97.76%   -0.01%     
==========================================
  Files        1357     1357              
  Lines       82130    82130              
  Branches     4174     4174              
==========================================
- Hits        80298    80297       -1     
- Misses       1832     1833       +1     

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: sarahchen6/clean-3.x-gemfiles
Commit report: 407ac47
Test service: dd-trace-rb

✅ 0 Failed, 22069 Passed, 1458 Skipped, 5m 23.71s Total Time