copy pasta is bad, fixed superfluous ,

lib/src/commands.rs

@@ -563,7 +563,7 @@ impl Command for SendCommand {
     }
 }
         // Execute the transaction and handle the result.
-        match lightclient.do_send(tos, &selected_fee,) {
+        match lightclient.do_send(tos, &selected_fee) {
             Ok(txid) => object!{ "txid" => txid }.pretty(2),
             Err(e) => object!{ "error" => e }.pretty(2),
         }