Revert "provide two alternative serializations for minhash 1) pickle (likely faster) 2) serialize/deserialize (space-efficient)"
Revert "provide two alternative serializations for minhash 1) pickle (likely faster) 2) serialize/deserialize (space-efficient)"

This reverts commit 76fc6867cf7ad7a87b6959b4d1945ae8c43717ea.

ekzhu/datasketch,chubbymaggie/datasketch,ekzhu/datasketch,arbazkhan002/datasketch