What

This PR reverts #405

Why

#405 introduced the ability to extract strings (title) from the property styles.blocks.variations of the theme.json — these were missing and detected during the beta period.

Later on, the feature received more feedback and the consensus was to remove the ability to register block style variations from theme.json. That together with some changes to the shape of the styles subtree, made #405 unnecessary, as there is no longer a title key to translate.

How

Revert the changes introduced in #405

Test

Automated test should pass. They are now broken in main. See setup instructions at #405

composer install
composer behat -- features/makepot.feature