Remove migrate collection thumbnails rake

[kirkkwang]

We discovered on staging that we don't actually need this because the collection thumbnails are still presenter after migrating the collection to a collection resource.

Hyrax::IndexesThumbnailsDecorator#thumbnail_path will handle the fallback which is why it is working.

Ref:

• Valkyrize Pals: Run work migration script  scientist-softserv/palni_palci_knapsack#110

[github-actions]

Test Results

    3 files  ±0      3 suites  ±0   18m 17s ⏱️ +26s
2 024 tests  - 3  1 974 ✅  - 3  50 💤 ±0  0 ❌ ±0 
2 051 runs   - 3  1 999 ✅  - 3  52 💤 ±0  0 ❌ ±0 

Results for commit 658a157. ± Comparison against base commit d16e66d.

This pull request removes 45 and adds 42 tests. Note that renamed tests count towards both.

spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to destroy 5f78f05c-7341-4438-b652-9e8ea61500c0
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to edit 34e8ff4d-4a4a-4598-aa5f-9da0cf907c85
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to read a0061912-a5c1-4767-b4d5-c88057b904f4
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to update 19e90276-32ca-4db7-8a07-8cc027a67794
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to destroy 850a39d8-e7cd-4fd5-997c-2ccca15d896b
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to edit 8740c17b-054c-4876-8a1a-3bce5079e89e
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to read ab0b34f8-9473-434c-9bb6-abf659e0821f
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to update efd0c5f3-d886-4796-8558-d1214f596a63
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor GenericWork permissions is expected not to be able to destroy 38034f89-8b9e-4bf1-9dc7-432862130916
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor GenericWork permissions is expected not to be able to edit f01fdf61-fe20-413d-8816-53989dba8a88
…

spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to destroy b94436a6-67dc-4341-9342-352b51ad4f68
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to edit 187a5cb9-8152-4aa6-8cd2-2a8c00a31b95
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to read 1c209e09-f4e6-4d52-b6dd-d45a5c79b8ec
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor Etd permissions is expected not to be able to update 096b7fc9-6226-4c24-816c-5d6af5c494e2
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to destroy 1f0d2bf2-aa5c-4dd4-9ad1-41f0dba4003b
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to edit 98c563fc-7fad-40b4-9919-028cf3fe981c
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to read 05ffce55-4010-4edc-adb9-2d462cccb03a
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor FileSet permissions is expected not to be able to update 088e5191-726a-46c9-a3ab-71e153a7fa75
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor GenericWork permissions is expected not to be able to destroy 49e593fe-d0ea-4919-9943-99a9e08a29fe
spec.abilities.work_ability_spec ‑ Hyrax::Ability::WorkAbility when work depositor GenericWork permissions is expected not to be able to edit a62edebd-5e52-424a-9185-a4d28153e85d
…