statistics: remove useless GetFullTableName

[hawkingrei]

What problem does this PR solve?

Issue Number: close #52553

Problem Summary:

What changed and how does it work?

GetFullTableName only is used in the write, but nothing will read it. so we can remove this useless function.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, hi-rustin

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• pkg/statistics/OWNERS [AilinKid,hi-rustin]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-12 08:49:00.524811219 +0000 UTC m=+1211402.052351762: ☑️ agreed by hi-rustin.
• 2024-04-12 08:54:22.011055203 +0000 UTC m=+1211723.538595749: ☑️ agreed by AilinKid.

[hawkingrei]

/cherrypick release-7.5
/cherrypick release-8.1

[ti-chi-bot]

@hawkingrei: new pull request created to branch release-7.5: #52587.

In response to this:

/cherrypick release-7.5
/cherrypick release-8.1

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

@hawkingrei: new pull request created to branch release-8.1: #52588.

In response to this:

/cherrypick release-7.5
/cherrypick release-8.1

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.