remove default client data (where text hints go)

src/bin/client/rsc.rs

@@ -9,8 +9,8 @@ pub struct ClientData {
 impl Default for ClientData {
     fn default() -> Self {
         Self {
-            ip: "localhost:39420".to_string(),
-            username: "your [NOVEMBER]".to_string(),
+            ip: String::new(),
+            username: String::new(),
         }
     }
 }