Revert "more backwards compatibility, for _fizzled_parents"

This reverts commit 445eced59a8be32936a0f50b0673a4aa0d216383.
Revert "add backwards compatibility for allow_fizzled_parents"

This reverts commit 55b7a739ead41d59a34c1e10eabfbd5345790896.
Revert "rename FIZZLED to FAILED"

This reverts commit eb4db6eb79f6cb51f9f0b9aff8167d73d5244eb3.