[types] Delete this comment because function 'encode_raw_bytes' no longer exsits.
[types] Delete this comment because function 'encode_raw_bytes' no longer exsits.

Closes: #1269
Approved by: huitseeker

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