[release][cinder] please delete cinderlib stable/ussuri branch

Hello Release Team, Some changes were bot-proposed recently to the cinderlib stable/ussuri branch, which was weird because that branch was tagged EOL by change I75092342fe684892f8a73eab9ad5da4515cb1da5. The change merged on 2022-08-31, and the ussuri-eol tag exists in the code repository, but apparently the branch was never deleted. Could you please delete the branch? thanks!