[ISSUE #5963] Remove the useless exception class: MQRedirectException

[socutes]

The exception class MQRedirectException defined in the client package is not used and can be removed.
path：org.apache.rocketmq.client.exception.MQRedirectException

Fix #5963

[socutes]

@zhouxinyu PTAL

[mxsm]

Hey @socutes you can see this document how to link issue. You can link a pull request or branch to an issue to show that a fix is in progress and to automatically close the issue when the pull request or branch is merged.

[socutes]

link

Fixed, Thanks.
@mxsm PTAL

[zhouxinyu]

LGTM, @aaron-ai Please help check if we have used this class in any runtime env or other repo.

[aaron-ai]

LGTM, @aaron-ai Please help check if we have used this class in any runtime env or other repo.

it is redundant seemingly.