chore(pblock-list): remove duplicate pino subtree

The pblock-list/pino/ directory was a byte-for-byte duplicate of its parent's
program/, sdk/, and cli/ subdirectories. It was introduced by an accidental
cp -r in solana-developers#398 and later renamed from pinocchio/ to pino/ in solana-developers#461. Neither
copy was built by CI.

The parent pblock-list/program/ is the canonical Pinocchio implementation.
Deleting the duplicate subtree to remove ~5.7K lines of redundant files.

Author: rocketiotemp