style(main): remove unused result warnings in main.rs

src/main.rs

@@ -3,7 +3,7 @@ use std::{env, io::{stdin, stdout, Write}, path::Path, process::{Child, Command,
 fn main(){
     loop {
         print!("> ");
-        stdout().flush();
+        let _ = stdout().flush();
 
         let mut input = String::new();
         stdin().read_line(&mut input).unwrap();
@@ -66,7 +66,7 @@ fn main(){
 
         if let Some(mut final_command) = previous_command {
             // block until the final command has finished
-            final_command.wait();
+            let _ = final_command.wait();
         }
 
     }