bin/ircd: remove const vars from main.rs

bin/ircd/src/main.rs

@@ -50,9 +50,6 @@ use crate::{
     },
 };
 
-pub const MAXIMUM_LENGTH_OF_MESSAGE: usize = 1024;
-pub const MAXIMUM_LENGTH_OF_NICKNAME: usize = 32;
-
 #[derive(serde::Serialize)]
 struct KeyPair {
     private_key: String,