docs: Update maintainers list

[demirkayaender]

• docs: Update MAINTAINERS.md
• Remove two more ex-maintainers

[gitar-bot]

🔍 CI failure analysis for c16c797: The codecov test failure is unrelated to the MAINTAINERS.md documentation changes and appears to be a flaky test in the matching service.

Issue

The codecov CI job failed due to a test failure in TestCheckIdleTaskList/Active_adding_task at service/matching/tasklist/task_list_manager_test.go:519.

Error: Not equal: 
  expected: int(0)
  actual  : int32(1)

Root Cause

This failure is unrelated to the PR changes. The PR only modifies MAINTAINERS.md (a documentation file removing 4 ex-maintainer entries), while the failure occurs in the matching service's task list manager logic.

The test appears to be flaky due to timing-sensitive assertions around idle task list behavior. The logs show:

• "Task list manager stopping because no recent events" with interval: "10ms"
• The test expects 0 but gets 1, indicating a race condition where the idle check result depends on precise timing

Details

This is a classic flaky test scenario where:

1. The test checks task list manager state after an idle timeout period
2. The assertion is sensitive to exact timing (10ms interval)
3. Documentation changes cannot affect matching service runtime behavior
4. The failure is either pre-existing or intermittent due to CI environment timing variations

Code Review ✅ Approved

Clean documentation update removing 4 ex-maintainers from MAINTAINERS.md. No issues found - straightforward line deletions with alphabetical ordering preserved.

Rules ❌ No requirements met

Repository Rules

❌ PR Description Quality Standards: Add structured sections per template: [What changed?], [Why?] with maintainer names/context, [How did you test it?] with verification steps, and [Potential risks].

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[c-warren]

LGTM