Remove ArrayPartitionOptimizations subpackage

The partition-level any/all short-circuiting is not actually an
optimization — the AbstractArray fallback already short-circuits
element-by-element. Both stop at the first match. Iterating
partition-by-partition doesn't skip any work.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas