[Issue] Fix variable name in catalogsearch

[m2-assistant[bot]]

This issue is automatically created based on existing pull request: magento/magento2#33533: Fix variable name in catalogsearch

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Fix variable name, the search engine has nothing to do with a default country. PR Update: I've removed the unneccessary variable. Thanks for the idea @tzyganu ;-)

Description (*)

It's a bit strange and confusing to use a variable called $defaultCountry in the search engine module. I've renamed removed the variable, there's no change in the behavior/logic of the method.

Fixed Issues (if relevant)

none

Manual testing scenarios (*)

Change Search Engine in the magento admin panel: Stores > Settings > Configuration > Catalog > Catalog > Catalog Search

Contribution checklist (*)

• [X] Pull request has a meaningful description of its purpose
• [X] All commits are accompanied by meaningful commit messages
• [X] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• [ ] All automated tests passed successfully (all builds are green)

[github-jira-sync-bot]

:white_check_mark: Jira issue https://jira.corp.adobe.com/browse/AC-9215 is successfully created for this GitHub issue.

[m2-assistant[bot]]

:white_check_mark: Confirmed by @engcom-Lima. Thank you for verifying the issue.
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