Removing from_bytes from types/src/on_chain_config/validator_set.rs
Removing from_bytes from types/src/on_chain_config/validator_set.rs

Closes: #4148
Approved by: davidiw

aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra