Fixed duplicated getType documentation.

[Viproz]

This PR to fix a mistake I made while adding documentation for the preference library.
This removes the duplicated getType reference.

See #9111 for more details.

[github-actions]

Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "Removed duplicated getType documentation.": summary should not end with a period (full stop) summary looks empty type/action looks empty Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 20 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

👋 Hello Viproz, we appreciate your contribution to this project!

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