tree 1110df657081a6ff84918f0a7cef6db638ce829c
parent 867b1e6c220a28c143ca5ab8ab7ee79ea07bce80
author congbo <39078850+congbobo184@users.noreply.github.com> 1670656201 +0800
committer GitHub <noreply@github.com> 1670656201 +0800
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[cherry-pick][branch-2.9] Fix delete system topic clean topic policy (#18823) (#18831)

cherry-pick #18823
### Motivation
If users set topic policy for system topic, then delete this system topic, the topic policy should be deleted.

### Modification
Only change_events topic do not need to clear topic policies.

### Matching PR in forked repository

PR in forked repository: https://github.com/liangyepianzhou/pulsar/pull/16