refactor!: Remove obsolete event firing decorators

[mykola-mokhnach]

Change list

BREAKING CHANGES:

• Removed previously deprecated legacy Spring-based event decorators in favour of the Selenium's built-in one

Types of changes

• No changes in production code.
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[valfirst]

Does it make sense to add a note on breaking changes to the migration guide?

[mykola-mokhnach]

Does it make sense to add a note on breaking changes to the migration guide?

It's already there. The related stuff has been already marked as deprecated and now it's time to remove it completely for good (and publish in the next minor lib version)