GH-43592: [C++] Remove redundant default constructor/deconstructor in arrow::ArrayStatistics

[kou]

Rationale for this change

= default constructor/deconstructor are needless in arrow::ArrayStatistics.

What changes are included in this PR?

Remove them.

Are these changes tested?

Yes.

Are there any user-facing changes?

No.

• GitHub Issue: [C++] Remove redundant default constructor/deconstructor in arrow::ArrayStatistics #43592

[github-actions]

Thanks for opening a pull request!

If this is not a minor PR. Could you open an issue for this pull request on GitHub? https://github.com/apache/arrow/issues/new/choose

Opening GitHub issues ahead of time contributes to the Openness of the Apache Arrow project.

Then could you also rename the pull request title in the following format?

GH-${GITHUB_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

or

MINOR: [${COMPONENT}] ${SUMMARY}

In the case of PARQUET issues on JIRA the title also supports:

PARQUET-${JIRA_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

See also:

• Other pull requests
• Contribution Guidelines - Contributing Overview

[github-actions]

⚠️ GitHub issue #43592 has been automatically assigned in GitHub to PR creator.

[kou]

+1

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 06f9aee.

There were no benchmark performance regressions. 🎉

The full Conbench report has more details.