Resolve old TODO - Githubissues

Hi! Thank you for helping out with SSD1306 development! Please:

[x] Check that you've added documentation to any new methods
[x] Rebase from master if you're not already up to date
[x] Add or modify an example if there are changes to the public API
[x] Add a CHANGELOG.md entry in the Unreleased section under the appropriate heading (Added, Fixed, Changed, etc)
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PR description

This PR resolves an old todo item that I believe was added by myself. Relevant feature has been stable for some time now.