task: #3608379 Remove the #[LegacyHook] shims for full OOP hooks (9.2.x)

Rajab Natshahrequested to merge
issue/vartheme_bs4-3608379:3608379-remove-the-legacyhook into 9.2.x

Removes the redundant #[LegacyHook] backward-compat shims in vartheme_bs4.theme. All hook logic already lives in the OOP #[Hook] class (change record); for Drupal ~11.4.0 the standard theme hooks are invoked by core only.

Related issue: #3608379

This changeset was produced with AI assistance (Claude Code). Per the Drupal AI-generated contribution policy, it has been reviewed by a human before submission.

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Edited by Rajab Natshah

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