remove uneeded flags from the relayer
# --deploy flag

Can we get rid of this? I don't see the use-case on the relayer given that `swapd` deploys the forwarder, and the forwarder address needs to be embedded in the SwapFactory contract. Providing multiple ways of doing the exact same thing leads to end user confusion about possible differences, as well as increased documentation, testing and maintenance costs.

# --with-network

I think we decided that relayers are only going to be accessed remotely using libp2p, so I'd like to remove this flag. If we kept it, I'd ask to rename it to `--enable-libp2p` to clarify it's purpose.