Drupal 10.1: Revisions tab appears twice on Storage Entities

Problem/Motivation

Drupal 10.1 expanded version history UI support for revisionable entities:

• Drupal Core: Implement a generic revision UI
• Code changes

This adds a duplicated "Revisions" tab to entities created by modules that include their own local task in *.links.task.yml, as reported in other projects:

• Group: Drupal 10.1: Revisions tab appears twice on Groups
• Media Revisions UI: Drupal 10.1: Revisions tab appears twice on media

There is ongoing work aimed to fix this issue in Drupal 11:

• Drupal Core: Duplicate "revision_history" local tasks created

Steps to reproduce

• Add a storage type
• Create and visit a storage entity
• The Revisions tab appears twice

Proposed resolution

This can be fixed by unsetting the default local task by implementing hook_local_tasks_alter, or by removing the local task provided by the module in storage.links.task.yml.

Since revisions UI is now provided by Drupal, removing the task from the module offers a better long term solution.

The attached patch works with Storage 1.4, which requires Drupal => 10.1:

storage_duplicated_revisions_tab.patch