Removing round from consensus/consensus-types/src/proposal_msg.rs
Removing round from consensus/consensus-types/src/proposal_msg.rs

Closes: #4340
Approved by: huitseeker

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