Remove duplicate cli required_else_help arg helpers

The payjoin-cli expects some args else it lists a help
message for users as a walkthrough for creating a new
payjoin. There were some duplicate functions that were
causing some dev confusion so the duplicates were removed.

Author: benalleng

payjoin-cli/src/main.rs

@@ -147,7 +147,6 @@ fn cli() -> ArgMatches {
         Command::new("send")
             .arg_required_else_help(true)
             .arg(arg!(<BIP21> "The `bitcoin:...` payjoin uri to send to"))
-            .arg_required_else_help(true)
             .arg(
                 Arg::new("fee_rate")
                     .long("fee-rate")
@@ -159,8 +158,7 @@ fn cli() -> ArgMatches {
 
     let mut receive_cmd = Command::new("receive")
         .arg_required_else_help(true)
-        .arg(arg!(<AMOUNT> "The amount to receive in satoshis").value_parser(parse_amount_in_sat))
-        .arg_required_else_help(true);
+        .arg(arg!(<AMOUNT> "The amount to receive in satoshis").value_parser(parse_amount_in_sat));
 
     #[cfg(feature = "v2")]
     let mut cmd = cmd.subcommand(Command::new("resume"));