[chore](github)Remove 'Build Broker' task from .asf.yaml

[CalvinKirs]

fyi #64732

[hello-stephen]

Thank you for your contribution to Apache Doris.
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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[CalvinKirs]

run buildall

[CalvinKirs]

/review

[github-actions]

Review result: request changes.

I found one repository-metadata sequencing issue. The PR removes Build Broker from the required master status contexts, but the current base branch still has the Build Broker workflow job and the broker source path, and the referenced cleanup PR #64732 is still open.

Critical checkpoint conclusions:

• Goal/coverage: the intended cleanup is clear, but the current PR accomplishes it too early for master branch protection.
• Scope: the change is small and focused, limited to .asf.yaml.
• Concurrency/lifecycle/transaction/runtime compatibility: not applicable; this is ASF/GitHub metadata only.
• Parallel paths/config propagation: release-branch required contexts still include Build Broker; the issue is specifically that master would stop requiring a still-live CI job.
• Tests/CI: YAML parsing succeeds, and the live PR check shows Build Broker is skipped for this PR because no broker files changed. No Doris build/regression test was needed for this metadata-only review.
• User focus: no additional user focus was provided.

Subagent conclusions: optimizer-rewrite found no optimizer/rewrite impact. tests-session-config proposed TEST-1, which I verified and accepted as MAIN-1. In convergence round 1, both live subagents returned NO_NEW_VALUABLE_FINDINGS for the same final ledger/comment set.

[github-actions]

This drops Build Broker from the required master contexts while the job and the broker module are still live. The current base workflow still defines build-broker as name: Build Broker, runs it for fs_brokers/apache_hdfs_broker/**, and executes cd fs_brokers/apache_hdfs_broker/ && /bin/bash build.sh; the cleanup PR referenced in this PR body (#64732) is still open/unmerged. If ASF syncs this first, broker-path changes on master can merge without requiring the broker build even though that CI path still exists. Please keep this required until the broker-removal PR lands, or merge this metadata change together with/after that removal.

[github-actions]

PR approved by at least one committer and no changes requested.

novalid