Changes

Drop the interact-time bone meal placed-block reset

Right-clicking a crop with bone meal cleared its placed-block marker
during PlayerInteractEvent, before knowing whether the fertilize
actually happened. The listeners that watch real outcomes already
cover every legitimate case: crop stage growth fires BlockGrowEvent
(BlockListener#onBlockGrow) and propagule-to-tree growth fires
StructureGrowEvent (WorldListener#onStructureGrow), both of which
mark the affected blocks eligible again.

That left the interact-time reset only mattering when bone meal was
not consumed, which is exactly the shape of the free Herbalism XP
exploit reported in #5312; the nether wart block case was removed in
237890cf5, and any future non-fertilizable addition to the material
set would have reintroduced it. Removing the path entirely closes the
exploit class and resolves the old TODO questioning whether the code
was needed.
 (commit: 56ca96c)