Draft: Delete tasks with value-based mutex models with pthread alternatives
As suggested in !1460 (merged), the variants of these tasks using pthread mutexes instead of value-based models are superior, so the value-based variants can be removed to reduce duplication.
TODO
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Delete those affected by !1513 (merged). -
Delete the rest from !1460 (merged) (NB! Some may have still interesting value-based variants.)