Revert "[APPSEC-56614] Add Instrumentation::Gateway#pushed? method"

[sarahchen6]

Reverts #4459 to finish the 2.12.1 release. Will merge back in after the release is complete.

[github-actions]

👋 Hey @DataDog/ruby-guild, please fill "Change log entry" section in the pull request description.

If changes need to be present in CHANGELOG.md you can state it this way

**Change log entry**

Yes. A brief summary to be placed into the CHANGELOG.md

(possible answers Yes/Yep/Yeah)

Or you can opt out like that

**Change log entry**

None.

(possible answers No/Nope/None)

^{Visited at: 2025-03-06 13:21:39 UTC}

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.69%. Comparing base (e721aba) to head (53872f8).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4465      +/-   ##
==========================================
- Coverage   97.69%   97.69%   -0.01%     
==========================================
  Files        1376     1375       -1     
  Lines       83825    83812      -13     
  Branches     4251     4251              
==========================================
- Hits        81890    81877      -13     
  Misses       1935     1935              

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: revert-4459-appsec-56614-track-triggered-instrumentation-events
Commit report: 53872f8
Test service: dd-trace-rb

✅ 0 Failed, 20624 Passed, 1370 Skipped, 3m 14.14s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-03-06 13:44:05

Comparing candidate commit 53872f8 in PR branch revert-4459-appsec-56614-track-triggered-instrumentation-events with baseline commit e721aba in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 31 metrics, 2 unstable metrics.

[Strech]

👍🏼