locale_update_8001() makes updates to several block tables, which are no longer used folllowing #1535868: Convert all blocks into plugins. (This was added in #1222194: Rename global $language to $language_interface.)
Does this update need to run before the block update(s) to be added in #1871700: Provide an upgrade path to the new Block architecture from Drupal 7?
Updated issue summary.
Yeah we need to rename blocks in the process. Sounds like this should happen as part of #1871700: Provide an upgrade path to the new Block architecture from Drupal 7?
This has been removed and will be done with migrate
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