Remove not needed major version block for samsungtv migration

[gjohansson-ST]

Breaking change

Proposed change

Remove the not needed guard as it's managed centrally

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[home-assistant]

Hey there @chemelli74, mind taking a look at this pull request as it has been labeled with an integration (samsungtv) you are listed as a code owner for? Thanks!

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[Copilot]

Pull request overview

This PR removes a redundant “future version downgrade” guard from the Samsung TV config entry migration, relying on Home Assistant’s centralized config entry migration version check instead.

Changes:

• Remove the config_entry.version > 2 early-return guard from async_migrate_entry.
• Keep migration behavior otherwise unchanged (versions 1 → 2 and minor version adjustments remain intact).