Revert "chore: improve testing with injected coroutine dispatchers"

[jinliu9508]

Reverts #2524

Running into runtime issue with the CoroutineDispatcher being unable to be resolved by the ServiceProvider.

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This change is 

[abdulraqeeb33]

Thank you for reverting

[github-actions]

📊 Diff Coverage Report

Diff Coverage Report (Changed Lines Only)

Threshold: 80%

Changed Files Coverage

• ⚠️ CoroutineDispatcherProvider.kt: Not in coverage report (may not be compiled/tested)
• ⚠️ DefaultDispatcherProvider.kt: Not in coverage report (may not be compiled/tested)
• ✅ StartupService.kt: 1/1 changed lines (100.0%) (3 changed lines)
• ❌ OutcomeEventsRepository.kt: 0/6 changed lines (0.0%) (7 changed lines)
  • ⚠️ Below threshold: 6 uncovered changed lines
• ❌ NotificationRepository.kt: 0/14 changed lines (0.0%) (15 changed lines)
  • ⚠️ Below threshold: 14 uncovered changed lines
• ⚠️ TestDispatcherProvider.kt: Not in coverage report (may not be compiled/tested)

Overall Coverage (Changed Lines Only)

1/21 changed lines covered (4.8%)

❌ Coverage Check Failed

Files below 80% threshold:

• OutcomeEventsRepository.kt: 0.0% (6 uncovered changed lines)

• NotificationRepository.kt: 0.0% (14 uncovered changed lines)

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